2131023213212 has 12 divisors (see below), whose sum is σ = 3820248931296. Its totient is φ = 1039523518560.

The previous prime is 2131023213197. The next prime is 2131023213217. The reversal of 2131023213212 is 2123123201312.

It is a super-2 number, since 2×2131023213212² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131023213217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6497021828 + ... + 6497022155.

It is an arithmetic number, because the mean of its divisors is an integer number (318354077608).

Almost surely, 2^{2131023213212} is an apocalyptic number.

It is an amenable number.

2131023213212 is a deficient number, since it is larger than the sum of its proper divisors (1689225718084).

2131023213212 is a wasteful number, since it uses less digits than its factorization.

2131023213212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12994044028 (or 12994044026 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2131023213212 its reverse (2123123201312), we get a palindrome (4254146414524).

The spelling of 2131023213212 in words is "two trillion, one hundred thirty-one billion, twenty-three million, two hundred thirteen thousand, two hundred twelve".