21201222012202 has 16 divisors (see below), whose sum is σ = 32456508285960. Its totient is φ = 10383060493312.

The previous prime is 21201222012193. The next prime is 21201222012227. The reversal of 21201222012202 is 20221022210212.

It can be written as a sum of positive squares in 4 ways, for example, as 17210292863841 + 3990929148361 = 4148529^2 + 1997731^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21201222012202.

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, 168580927 + ... + 168706642.

Almost surely, 2^{21201222012202} is an apocalyptic number.

21201222012202 is a deficient number, since it is larger than the sum of its proper divisors (11255286273758).

21201222012202 is a wasteful number, since it uses less digits than its factorization.

21201222012202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337288217.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21201222012202 its reverse (20221022210212), we get a palindrome (41422244222414).

The spelling of 21201222012202 in words is "twenty-one trillion, two hundred one billion, two hundred twenty-two million, twelve thousand, two hundred two".