21220312122202 has 8 divisors (see below), whose sum is σ = 31837938383412. Its totient is φ = 10607665994400.

The previous prime is 21220312122167. The next prime is 21220312122257. The reversal of 21220312122202 is 20222121302212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12648059200921 + 8572252921281 = 3556411^2 + 2927841^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1245022699 + ... + 1245039742.

Almost surely, 2^{21220312122202} is an apocalyptic number.

21220312122202 is a deficient number, since it is larger than the sum of its proper divisors (10617626261210).

21220312122202 is a wasteful number, since it uses less digits than its factorization.

21220312122202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490066704.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21220312122202 its reverse (20222121302212), we get a palindrome (41442433424414).

The spelling of 21220312122202 in words is "twenty-one trillion, two hundred twenty billion, three hundred twelve million, one hundred twenty-two thousand, two hundred two".