211220220101212 has 24 divisors (see below), whose sum is σ = 431428534677504. Its totient is φ = 88596931227312.

The previous prime is 211220220101179. The next prime is 211220220101239. The reversal of 211220220101212 is 212101022022112.

It is a super-2 number, since 2×211220220101212² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211220220101212.

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, 80250842188 + ... + 80250844819.

It is an arithmetic number, because the mean of its divisors is an integer number (17976188944896).

Almost surely, 2^{211220220101212} is an apocalyptic number.

It is an amenable number.

211220220101212 is an abundant number, since it is smaller than the sum of its proper divisors (220208314576292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211220220101212 is a wasteful number, since it uses less digits than its factorization.

211220220101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160501687065 (or 160501687063 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 211220220101212 its reverse (212101022022112), we get a palindrome (423321242123324).

The spelling of 211220220101212 in words is "two hundred eleven trillion, two hundred twenty billion, two hundred twenty million, one hundred one thousand, two hundred twelve".