211211120021212 has 24 divisors (see below), whose sum is σ = 377382492837504. Its totient is φ = 103406427315312.

The previous prime is 211211120021201. The next prime is 211211120021227. The reversal of 211211120021212 is 212120021112112.

It is a happy number.

It is a super-2 number, since 2×211211120021212² (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 211211120021212.

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, 2359539658 + ... + 2359629169.

It is an arithmetic number, because the mean of its divisors is an integer number (15724270534896).

Almost surely, 2^{211211120021212} is an apocalyptic number.

It is an amenable number.

211211120021212 is a deficient number, since it is larger than the sum of its proper divisors (166171372816292).

211211120021212 is a wasteful number, since it uses less digits than its factorization.

211211120021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4719169065 (or 4719169063 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211211120021212 its reverse (212120021112112), we get a palindrome (423331141133324).

The spelling of 211211120021212 in words is "two hundred eleven trillion, two hundred eleven billion, one hundred twenty million, twenty-one thousand, two hundred twelve".