21202211121202 has 16 divisors (see below), whose sum is σ = 32000192998560. Its totient is φ = 10535487292512.

The previous prime is 21202211121187. The next prime is 21202211121227. The reversal of 21202211121202 is 20212111220212.

It is a self number, because there is not a number n which added to its sum of digits gives 21202211121202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4160449 + ... + 7727467.

It is an arithmetic number, because the mean of its divisors is an integer number (2000012062410).

Almost surely, 2^{21202211121202} is an apocalyptic number.

21202211121202 is a deficient number, since it is larger than the sum of its proper divisors (10797981877358).

21202211121202 is a wasteful number, since it uses less digits than its factorization.

21202211121202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3585417.

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

Adding to 21202211121202 its reverse (20212111220212), we get a palindrome (41414322341414).

It can be divided in two parts, 2120221 and 1121202, that added together give a palindrome (3241423).

The spelling of 21202211121202 in words is "twenty-one trillion, two hundred two billion, two hundred eleven million, one hundred twenty-one thousand, two hundred two".