211012131204 has 144 divisors (see below), whose sum is σ = 615941044992. Its totient is φ = 59661950976.

The previous prime is 211012131193. The next prime is 211012131241. The reversal of 211012131204 is 402131210112.

It is a super-2 number, since 2×211012131204² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 71455392 + ... + 71458344.

It is an arithmetic number, because the mean of its divisors is an integer number (4277368368).

Almost surely, 2^211012131204 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 211012131204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307970522496).

211012131204 is an abundant number, since it is smaller than the sum of its proper divisors (404928913788).

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

211012131204 is a wasteful number, since it uses less digits than its factorization.

211012131204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5826 (or 5821 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 211012131204 its reverse (402131210112), we get a palindrome (613143341316).

The spelling of 211012131204 in words is "two hundred eleven billion, twelve million, one hundred thirty-one thousand, two hundred four".