20211220012202 has 4 divisors (see below), whose sum is σ = 30316830018306. Its totient is φ = 10105610006100.

The previous prime is 20211220012177. The next prime is 20211220012231. The reversal of 20211220012202 is 20221002211202.

It is a happy number.

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., 12795723106321 + 7415496905881 = 3577111^2 + 2723141^2 .

It is a super-2 number, since 2×20211220012202² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5052805003049 + ... + 5052805003052.

Almost surely, 2^{20211220012202} is an apocalyptic number.

20211220012202 is a deficient number, since it is larger than the sum of its proper divisors (10105610006104).

20211220012202 is a wasteful number, since it uses less digits than its factorization.

20211220012202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10105610006103.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20211220012202 its reverse (20221002211202), we get a palindrome (40432222223404).

The spelling of 20211220012202 in words is "twenty trillion, two hundred eleven billion, two hundred twenty million, twelve thousand, two hundred two".