102100111220 has 48 divisors (see below), whose sum is σ = 214834032000. Its totient is φ = 40759416960.

The previous prime is 102100111151. The next prime is 102100111237. The reversal of 102100111220 is 22111001201.

It is a super-2 number, since 2×102100111220² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 28509830 + ... + 28513410.

It is an arithmetic number, because the mean of its divisors is an integer number (4475709000).

Almost surely, 2^102100111220 is an apocalyptic number.

102100111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102100111220 is an abundant number, since it is smaller than the sum of its proper divisors (112733920780).

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

102100111220 is a wasteful number, since it uses less digits than its factorization.

102100111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6008 (or 6006 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 102100111220 its reverse (22111001201), we get a palindrome (124211112421).

The spelling of 102100111220 in words is "one hundred two billion, one hundred million, one hundred eleven thousand, two hundred twenty".