102001022121020 has 48 divisors (see below), whose sum is σ = 243834854473728. Its totient is φ = 35478616388160.

The previous prime is 102001022120999. The next prime is 102001022121079. The reversal of 102001022121020 is 20121220100201.

It is a super-2 number, since 2×102001022121020² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102001022120986 and 102001022121004.

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, 10079147324 + ... + 10079157443.

It is an arithmetic number, because the mean of its divisors is an integer number (5079892801536).

Almost surely, 2^{102001022121020} is an apocalyptic number.

102001022121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102001022121020 is an abundant number, since it is smaller than the sum of its proper divisors (141833832352708).

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

102001022121020 is a wasteful number, since it uses less digits than its factorization.

102001022121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20158304810 (or 20158304808 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102001022121020 its reverse (20121220100201), we get a palindrome (122122242221221).

The spelling of 102001022121020 in words is "one hundred two trillion, one billion, twenty-two million, one hundred twenty-one thousand, twenty".