20211021222212 has 12 divisors (see below), whose sum is σ = 35719478101356. Its totient is φ = 10005456050400.

The previous prime is 20211021222199. The next prime is 20211021222221. The reversal of 20211021222212 is 21222212011202.

It can be written as a sum of positive squares in 2 ways, for example, as 11501770313476 + 8709250908736 = 3391426^2 + 2951144^2 .

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, 25013639723 + ... + 25013640530.

It is an arithmetic number, because the mean of its divisors is an integer number (2976623175113).

Almost surely, 2^{20211021222212} is an apocalyptic number.

It is an amenable number.

20211021222212 is a deficient number, since it is larger than the sum of its proper divisors (15508456879144).

20211021222212 is a wasteful number, since it uses less digits than its factorization.

20211021222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50027280358 (or 50027280356 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20211021222212 its reverse (21222212011202), we get a palindrome (41433233233414).

The spelling of 20211021222212 in words is "twenty trillion, two hundred eleven billion, twenty-one million, two hundred twenty-two thousand, two hundred twelve".