211211221100012 has 24 divisors (see below), whose sum is σ = 422435900759040. Its totient is φ = 90516210780240.

The previous prime is 211211221099981. The next prime is 211211221100057. The reversal of 211211221100012 is 210001122112112.

It is a super-2 number, since 2×211211221100012² (a number of 29 digits) contains 22 as substring.

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, 119271062 + ... + 121028957.

It is an arithmetic number, because the mean of its divisors is an integer number (17601495864960).

Almost surely, 2^{211211221100012} is an apocalyptic number.

It is an amenable number.

211211221100012 is an abundant number, since it is smaller than the sum of its proper divisors (211224679659028).

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

211211221100012 is a wasteful number, since it uses less digits than its factorization.

211211221100012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240331421 (or 240331419 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 211211221100012 its reverse (210001122112112), we get a palindrome (421212343212124).

The spelling of 211211221100012 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred twenty-one million, one hundred thousand, twelve".