210122000001 has 12 divisors (see below), whose sum is σ = 311712517012. Its totient is φ = 136295351136.

The previous prime is 210121999993. The next prime is 210122000041. The reversal of 210122000001 is 100000221012.

It can be written as a sum of positive squares in 2 ways, for example, as 155197390401 + 54924609600 = 393951^2 + 234360^2 .

It is not a de Polignac number, because 210122000001 - 2³ = 210121999993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210122000041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 315498166 + ... + 315498831.

Almost surely, 2^210122000001 is an apocalyptic number.

It is an amenable number.

210122000001 is a deficient number, since it is larger than the sum of its proper divisors (101590517011).

210122000001 is a wasteful number, since it uses less digits than its factorization.

210122000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630997040 (or 630997037 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 210122000001 its reverse (100000221012), we get a palindrome (310122221013).

The spelling of 210122000001 in words is "two hundred ten billion, one hundred twenty-two million, one", and thus it is an aban number.