21211202211201 has 48 divisors (see below), whose sum is σ = 31249152043200. Its totient is φ = 13861691899776.

The previous prime is 21211202211197. The next prime is 21211202211209. The reversal of 21211202211201 is 10211220211212.

21211202211201 is a `hidden beast` number, since 2 + 121 + 120 + 221 + 1 + 201 = 666.

It is not a de Polignac number, because 21211202211201 - 2² = 21211202211197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21211202211209) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 177390831 + ... + 177510363.

It is an arithmetic number, because the mean of its divisors is an integer number (651024000900).

Almost surely, 2^{21211202211201} is an apocalyptic number.

It is an amenable number.

21211202211201 is a deficient number, since it is larger than the sum of its proper divisors (10037949831999).

21211202211201 is a wasteful number, since it uses less digits than its factorization.

21211202211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121470 (or 121467 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21211202211201 its reverse (10211220211212), we get a palindrome (31422422422413).

The spelling of 21211202211201 in words is "twenty-one trillion, two hundred eleven billion, two hundred two million, two hundred eleven thousand, two hundred one".