21211012210201 has 16 divisors (see below), whose sum is σ = 23167018844928. Its totient is φ = 19259638952400.

The previous prime is 21211012210189. The next prime is 21211012210231. The reversal of 21211012210201 is 10201221011212.

It is a de Polignac number, because none of the positive numbers 2^k-21211012210201 is a prime.

It is a super-2 number, since 2×21211012210201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211012210231) 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, 37728970 + ... + 38287036.

It is an arithmetic number, because the mean of its divisors is an integer number (1447938677808).

Almost surely, 2^{21211012210201} is an apocalyptic number.

It is an amenable number.

21211012210201 is a deficient number, since it is larger than the sum of its proper divisors (1956006634727).

21211012210201 is a wasteful number, since it uses less digits than its factorization.

21211012210201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562212.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21211012210201 its reverse (10201221011212), we get a palindrome (31412233221413).

The spelling of 21211012210201 in words is "twenty-one trillion, two hundred eleven billion, twelve million, two hundred ten thousand, two hundred one".