20121020552 has 16 divisors (see below), whose sum is σ = 37728733200. Its totient is φ = 10060025040.

The previous prime is 20121020537. The next prime is 20121020561. The reversal of 20121020552 is 25502012102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164927 + ... + 259697.

It is an arithmetic number, because the mean of its divisors is an integer number (2358045825).

Almost surely, 2^20121020552 is an apocalyptic number.

It is an amenable number.

20121020552 is a deficient number, since it is larger than the sum of its proper divisors (17607712648).

20121020552 is a wasteful number, since it uses less digits than its factorization.

20121020552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121316 (or 121312 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 20121020552 its reverse (25502012102), we get a palindrome (45623032654).

The spelling of 20121020552 in words is "twenty billion, one hundred twenty-one million, twenty thousand, five hundred fifty-two".