102111220020 has 48 divisors (see below), whose sum is σ = 290178762048. Its totient is φ = 26823244800.

The previous prime is 102111220019. The next prime is 102111220021. The reversal of 102111220020 is 20022111201.

It is an interprime number because it is at equal distance from previous prime (102111220019) and next prime (102111220021).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 102111219978 and 102111220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111220021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12696381 + ... + 12704420.

It is an arithmetic number, because the mean of its divisors is an integer number (6045390876).

Almost surely, 2^102111220020 is an apocalyptic number.

102111220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102111220020 is an abundant number, since it is smaller than the sum of its proper divisors (188067542028).

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

102111220020 is a wasteful number, since it uses less digits than its factorization.

102111220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25400880 (or 25400878 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102111220020 its reverse (20022111201), we get a palindrome (122133331221).

The spelling of 102111220020 in words is "one hundred two billion, one hundred eleven million, two hundred twenty thousand, twenty".