211211331312 has 40 divisors (see below), whose sum is σ = 563230220800. Its totient is φ = 68132687040.

The previous prime is 211211331277. The next prime is 211211331347. The reversal of 211211331312 is 213133112112.

It is an interprime number because it is at equal distance from previous prime (211211331277) and next prime (211211331347).

It is a super-2 number, since 2×211211331312² (a number of 23 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 70970062 + ... + 70973037.

It is an arithmetic number, because the mean of its divisors is an integer number (14080755520).

Almost surely, 2^211211331312 is an apocalyptic number.

It is an amenable number.

211211331312 is an abundant number, since it is smaller than the sum of its proper divisors (352018889488).

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

211211331312 is a wasteful number, since it uses less digits than its factorization.

211211331312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141943141 (or 141943135 counting only the distinct ones).

The product of its digits is 216, while the sum is 21.

Adding to 211211331312 its reverse (213133112112), we get a palindrome (424344443424).

The spelling of 211211331312 in words is "two hundred eleven billion, two hundred eleven million, three hundred thirty-one thousand, three hundred twelve".