20020220123121 has 12 divisors (see below), whose sum is σ = 28918191144960. Its totient is φ = 13346769379320.

The previous prime is 20020220123051. The next prime is 20020220123149. The reversal of 20020220123121 is 12132102202002.

20020220123121 is a `hidden beast` number, since 200 + 2 + 0 + 220 + 123 + 121 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-20020220123121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20020220123094 and 20020220123103.

It is not an unprimeable number, because it can be changed into a prime (20020220123521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 660465 + ... + 6362126.

It is an arithmetic number, because the mean of its divisors is an integer number (2409849262080).

Almost surely, 2^{20020220123121} is an apocalyptic number.

It is an amenable number.

20020220123121 is a deficient number, since it is larger than the sum of its proper divisors (8897971021839).

20020220123121 is a wasteful number, since it uses less digits than its factorization.

20020220123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7339356 (or 7339353 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20020220123121 its reverse (12132102202002), we get a palindrome (32152322325123).

The spelling of 20020220123121 in words is "twenty trillion, twenty billion, two hundred twenty million, one hundred twenty-three thousand, one hundred twenty-one".