202020120102001 has 4 divisors (see below), whose sum is σ = 202020148836352. Its totient is φ = 202020091367652.

The previous prime is 202020120101951. The next prime is 202020120102023. The reversal of 202020120102001 is 100201021020202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 202020120102001 - 2³³ = 202011530167409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202120120102001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4038736 + ... + 20502478.

It is an arithmetic number, because the mean of its divisors is an integer number (50505037209088).

Almost surely, 2^{202020120102001} is an apocalyptic number.

It is an amenable number.

202020120102001 is a deficient number, since it is larger than the sum of its proper divisors (28734351).

202020120102001 is a wasteful number, since it uses less digits than its factorization.

202020120102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28734350.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202020120102001 its reverse (100201021020202), we get a palindrome (302221141122203).

The spelling of 202020120102001 in words is "two hundred two trillion, twenty billion, one hundred twenty million, one hundred two thousand, one".