202120000001 has 16 divisors (see below), whose sum is σ = 213320515584. Its totient is φ = 191131318224.

The previous prime is 202119999989. The next prime is 202120000013. The reversal of 202120000001 is 100000021202.

It is an interprime number because it is at equal distance from previous prime (202119999989) and next prime (202120000013).

It is a cyclic number.

It is not a de Polignac number, because 202120000001 - 2²⁶ = 202052891137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202120000081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 704390 + ... + 948896.

It is an arithmetic number, because the mean of its divisors is an integer number (13332532224).

Almost surely, 2^202120000001 is an apocalyptic number.

It is an amenable number.

202120000001 is a deficient number, since it is larger than the sum of its proper divisors (11200515583).

202120000001 is a wasteful number, since it uses less digits than its factorization.

202120000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244940.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 202120000001 its reverse (100000021202), we get a palindrome (302120021203).

The spelling of 202120000001 in words is "two hundred two billion, one hundred twenty million, one", and thus it is an aban number.