21201122211202 has 4 divisors (see below), whose sum is σ = 31801683316806. Its totient is φ = 10600561105600.

The previous prime is 21201122211077. The next prime is 21201122211211. The reversal of 21201122211202 is 20211222110212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19879907598721 + 1321214612481 = 4458689^2 + 1149441^2 .

It is a super-3 number, since 3×21201122211202³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21201122211202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300280552799 + ... + 5300280552802.

Almost surely, 2^{21201122211202} is an apocalyptic number.

21201122211202 is a deficient number, since it is larger than the sum of its proper divisors (10600561105604).

21201122211202 is a wasteful number, since it uses less digits than its factorization.

21201122211202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10600561105603.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21201122211202 its reverse (20211222110212), we get a palindrome (41412344321414).

The spelling of 21201122211202 in words is "twenty-one trillion, two hundred one billion, one hundred twenty-two million, two hundred eleven thousand, two hundred two".