121023013021020 has 144 divisors (see below), whose sum is σ = 400652821715328. Its totient is φ = 29325969425280.

The previous prime is 121023013021003. The next prime is 121023013021061. The reversal of 121023013021020 is 20120310320121.

121023013021020 is a `hidden beast` number, since 1 + 2 + 102 + 301 + 30 + 210 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121023013020984 and 121023013021002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8992314 + ... + 17969633.

It is an arithmetic number, because the mean of its divisors is an integer number (2782311261912).

Almost surely, 2^{121023013021020} is an apocalyptic number.

121023013021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121023013021020 is an abundant number, since it is smaller than the sum of its proper divisors (279629808694308).

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

121023013021020 is a wasteful number, since it uses less digits than its factorization.

121023013021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26964240 (or 26964235 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121023013021020 its reverse (20120310320121), we get a palindrome (141143323341141).

The spelling of 121023013021020 in words is "one hundred twenty-one trillion, twenty-three billion, thirteen million, twenty-one thousand, twenty".