2100631212 has 24 divisors (see below), whose sum is σ = 5446081200. Its totient is φ = 700210368.

The previous prime is 2100631171. The next prime is 2100631217. The reversal of 2100631212 is 2121360012.

2100631212 is a `hidden beast` number, since 2 + 10 + 0 + 631 + 21 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (2100631217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9725037 + ... + 9725252.

It is an arithmetic number, because the mean of its divisors is an integer number (226920050).

Almost surely, 2^2100631212 is an apocalyptic number.

It is an amenable number.

2100631212 is an abundant number, since it is smaller than the sum of its proper divisors (3345449988).

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

2100631212 is a wasteful number, since it uses less digits than its factorization.

2100631212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19450302 (or 19450294 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2100631212 is about 45832.6435196575. The cubic root of 2100631212 is about 1280.7074564101.

Adding to 2100631212 its reverse (2121360012), we get a palindrome (4221991224).

The spelling of 2100631212 in words is "two billion, one hundred million, six hundred thirty-one thousand, two hundred twelve".