211312310136 has 64 divisors (see below), whose sum is σ = 547760253600. Its totient is φ = 67851399168.

The previous prime is 211312310063. The next prime is 211312310137. The reversal of 211312310136 is 631013213112.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211312310137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49221 + ... + 651956.

Almost surely, 2^211312310136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211312310136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273880126800).

211312310136 is an abundant number, since it is smaller than the sum of its proper divisors (336447943464).

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

211312310136 is a wasteful number, since it uses less digits than its factorization.

211312310136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701648 (or 701644 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 211312310136 its reverse (631013213112), we get a palindrome (842325523248).

The spelling of 211312310136 in words is "two hundred eleven billion, three hundred twelve million, three hundred ten thousand, one hundred thirty-six".