102011222220 has 96 divisors (see below), whose sum is σ = 295591355136. Its totient is φ = 26265657600.

The previous prime is 102011222191. The next prime is 102011222249. The reversal of 102011222220 is 22222110201.

It is an interprime number because it is at equal distance from previous prime (102011222191) and next prime (102011222249).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 102011222220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115435 + ... + 466205.

It is an arithmetic number, because the mean of its divisors is an integer number (3079076616).

Almost surely, 2^102011222220 is an apocalyptic number.

102011222220 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 102011222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147795677568).

102011222220 is an abundant number, since it is smaller than the sum of its proper divisors (193580132916).

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

102011222220 is a wasteful number, since it uses less digits than its factorization.

102011222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350951 (or 350949 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 102011222220 its reverse (22222110201), we get a palindrome (124233332421).

The spelling of 102011222220 in words is "one hundred two billion, eleven million, two hundred twenty-two thousand, two hundred twenty".