211211210112 has 64 divisors (see below), whose sum is σ = 641176896000. Its totient is φ = 60346059264.

The previous prime is 211211210083. The next prime is 211211210141. The reversal of 211211210112 is 211012112112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (211211210083) and next prime (211211210141).

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×211211210112² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211211210091 and 211211210100.

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, 39285112 + ... + 39290487.

It is an arithmetic number, because the mean of its divisors is an integer number (10018389000).

Almost surely, 2^211211210112 is an apocalyptic number.

It is an amenable number.

211211210112 is an abundant number, since it is smaller than the sum of its proper divisors (429965685888).

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

211211210112 is an equidigital number, since it uses as much as digits as its factorization.

211211210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78575623 (or 78575611 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211211210112 its reverse (211012112112), we get a palindrome (422223322224).

The spelling of 211211210112 in words is "two hundred eleven billion, two hundred eleven million, two hundred ten thousand, one hundred twelve".