102021011110020 has 48 divisors (see below), whose sum is σ = 286303659243840. Its totient is φ = 27144190759296.

The previous prime is 102021011110009. The next prime is 102021011110043. The reversal of 102021011110020 is 20011110120201.

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 = 102021011109978 and 102021011110005.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1919104555 + ... + 1919157714.

It is an arithmetic number, because the mean of its divisors is an integer number (5964659567580).

Almost surely, 2^{102021011110020} is an apocalyptic number.

102021011110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021011110020 is an abundant number, since it is smaller than the sum of its proper divisors (184282648133820).

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

102021011110020 is a wasteful number, since it uses less digits than its factorization.

102021011110020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3838262724 (or 3838262722 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 102021011110020 its reverse (20011110120201), we get a palindrome (122032121230221).

The spelling of 102021011110020 in words is "one hundred two trillion, twenty-one billion, eleven million, one hundred ten thousand, twenty".