20112552201 has 72 divisors (see below), whose sum is σ = 33549116544. Its totient is φ = 10681070400.

The previous prime is 20112552197. The next prime is 20112552211. The reversal of 20112552201 is 10225521102.

It is not a de Polignac number, because 20112552201 - 2² = 20112552197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (20112552211) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2808976 + ... + 2816126.

It is an arithmetic number, because the mean of its divisors is an integer number (465959952).

Almost surely, 2^20112552201 is an apocalyptic number.

20112552201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20112552201 is a deficient number, since it is larger than the sum of its proper divisors (13436564343).

20112552201 is a wasteful number, since it uses less digits than its factorization.

20112552201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7259 (or 7233 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The spelling of 20112552201 in words is "twenty billion, one hundred twelve million, five hundred fifty-two thousand, two hundred one".