102111002131220 has 24 divisors (see below), whose sum is σ = 215353418238504. Its totient is φ = 40669102992896.

The previous prime is 102111002131207. The next prime is 102111002131241. The reversal of 102111002131220 is 22131200111201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1984001834116 + 100127000297104 = 1408546^2 + 10006348^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10956111449 + ... + 10956120768.

It is an arithmetic number, because the mean of its divisors is an integer number (8973059093271).

Almost surely, 2^{102111002131220} is an apocalyptic number.

102111002131220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102111002131220 is an abundant number, since it is smaller than the sum of its proper divisors (113242416107284).

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

102111002131220 is a wasteful number, since it uses less digits than its factorization.

102111002131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21912232459 (or 21912232457 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 102111002131220 its reverse (22131200111201), we get a palindrome (124242202242421).

The spelling of 102111002131220 in words is "one hundred two trillion, one hundred eleven billion, two million, one hundred thirty-one thousand, two hundred twenty".