21002202011212 has 12 divisors (see below), whose sum is σ = 36755144369440. Its totient is φ = 10500732191376.

The previous prime is 21002202011191. The next prime is 21002202011213. The reversal of 21002202011212 is 21211020220012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21002202011213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92075412 + ... + 92303227.

Almost surely, 2^{21002202011212} is an apocalyptic number.

It is an amenable number.

21002202011212 is a deficient number, since it is larger than the sum of its proper divisors (15752942358228).

21002202011212 is a wasteful number, since it uses less digits than its factorization.

21002202011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184407120 (or 184407118 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21002202011212 its reverse (21211020220012), we get a palindrome (42213222231224).

The spelling of 21002202011212 in words is "twenty-one trillion, two billion, two hundred two million, eleven thousand, two hundred twelve".