102221212340 has 96 divisors (see below), whose sum is σ = 234846447360. Its totient is φ = 37146387456.

The previous prime is 102221212337. The next prime is 102221212343. The reversal of 102221212340 is 43212122201.

It is an interprime number because it is at equal distance from previous prime (102221212337) and next prime (102221212343).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102221212343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9237731 + ... + 9248789.

It is an arithmetic number, because the mean of its divisors is an integer number (2446317160).

Almost surely, 2^102221212340 is an apocalyptic number.

102221212340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102221212340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117423223680).

102221212340 is an abundant number, since it is smaller than the sum of its proper divisors (132625235020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102221212340 is a wasteful number, since it uses less digits than its factorization.

102221212340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11641 (or 11639 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 102221212340 its reverse (43212122201), we get a palindrome (145433334541).

The spelling of 102221212340 in words is "one hundred two billion, two hundred twenty-one million, two hundred twelve thousand, three hundred forty".