210221012001 has 64 divisors (see below), whose sum is σ = 386511261696. Its totient is φ = 98080761600.

The previous prime is 210221011951. The next prime is 210221012063. The reversal of 210221012001 is 100210122012.

It is not a de Polignac number, because 210221012001 - 2¹⁸ = 210220749857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210221012081) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 834885 + ... + 1057106.

It is an arithmetic number, because the mean of its divisors is an integer number (6039238464).

Almost surely, 2^210221012001 is an apocalyptic number.

210221012001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210221012001 is a deficient number, since it is larger than the sum of its proper divisors (176290249695).

210221012001 is a wasteful number, since it uses less digits than its factorization.

210221012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892062.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210221012001 its reverse (100210122012), we get a palindrome (310431134013).

The spelling of 210221012001 in words is "two hundred ten billion, two hundred twenty-one million, twelve thousand, one".