102121022020020 has 48 divisors (see below), whose sum is σ = 285945752258880. Its totient is φ = 27231616290816.

The previous prime is 102121022020009. The next prime is 102121022020037. The reversal of 102121022020020 is 20020220121201.

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

It is a congruent number.

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, 17994637 + ... + 22979316.

It is an arithmetic number, because the mean of its divisors is an integer number (5957203172060).

Almost surely, 2^{102121022020020} is an apocalyptic number.

102121022020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102121022020020 is an abundant number, since it is smaller than the sum of its proper divisors (183824730238860).

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

102121022020020 is a wasteful number, since it uses less digits than its factorization.

102121022020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41015504 (or 41015502 counting only the distinct ones).

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

Adding to 102121022020020 its reverse (20020220121201), we get a palindrome (122141242141221).

The spelling of 102121022020020 in words is "one hundred two trillion, one hundred twenty-one billion, twenty-two million, twenty thousand, twenty".