211220252312 has 8 divisors (see below), whose sum is σ = 396037973100. Its totient is φ = 105610126152.

The previous prime is 211220252303. The next prime is 211220252329. The reversal of 211220252312 is 213252022112.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×211220252312² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13201265762 + ... + 13201265777.

Almost surely, 2^211220252312 is an apocalyptic number.

It is an amenable number.

211220252312 is a deficient number, since it is larger than the sum of its proper divisors (184817720788).

211220252312 is a wasteful number, since it uses less digits than its factorization.

211220252312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26402531545 (or 26402531541 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 211220252312 its reverse (213252022112), we get a palindrome (424472274424).

The spelling of 211220252312 in words is "two hundred eleven billion, two hundred twenty million, two hundred fifty-two thousand, three hundred twelve".