20201633121 has 16 divisors (see below), whose sum is σ = 27131336064. Its totient is φ = 13370049024.

The previous prime is 20201633113. The next prime is 20201633129. The reversal of 20201633121 is 12133610202.

It is an interprime number because it is at equal distance from previous prime (20201633113) and next prime (20201633129).

It is not a de Polignac number, because 20201633121 - 2³ = 20201633113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20201633129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374001 + ... + 424593.

It is an arithmetic number, because the mean of its divisors is an integer number (1695708504).

Almost surely, 2^20201633121 is an apocalyptic number.

It is an amenable number.

20201633121 is a deficient number, since it is larger than the sum of its proper divisors (6929702943).

20201633121 is a wasteful number, since it uses less digits than its factorization.

20201633121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51560.

The product of its (nonzero) digits is 432, while the sum is 21.

The spelling of 20201633121 in words is "twenty billion, two hundred one million, six hundred thirty-three thousand, one hundred twenty-one".