220121012212 has 24 divisors (see below), whose sum is σ = 409312564416. Its totient is φ = 103220320128.

The previous prime is 220121012197. The next prime is 220121012249. The reversal of 220121012212 is 212210121022.

It is a happy number.

It is a congruent number.

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, 5699968 + ... + 5738455.

It is an arithmetic number, because the mean of its divisors is an integer number (17054690184).

Almost surely, 2^220121012212 is an apocalyptic number.

It is an amenable number.

220121012212 is a deficient number, since it is larger than the sum of its proper divisors (189191552204).

220121012212 is a wasteful number, since it uses less digits than its factorization.

220121012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11438727 (or 11438725 counting only the distinct ones).

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

Adding to 220121012212 its reverse (212210121022), we get a palindrome (432331133234).

The spelling of 220121012212 in words is "two hundred twenty billion, one hundred twenty-one million, twelve thousand, two hundred twelve".