212103012131 has 4 divisors (see below), whose sum is σ = 212139343200. Its totient is φ = 212066681064.

The previous prime is 212103012103. The next prime is 212103012169. The reversal of 212103012131 is 131210301212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212103012131 - 2⁶ = 212103012067 is a prime.

It is a super-2 number, since 2×212103012131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212103012031) 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, 18156776 + ... + 18168453.

It is an arithmetic number, because the mean of its divisors is an integer number (53034835800).

Almost surely, 2^212103012131 is an apocalyptic number.

212103012131 is a deficient number, since it is larger than the sum of its proper divisors (36331069).

212103012131 is an equidigital number, since it uses as much as digits as its factorization.

212103012131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36331068.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 212103012131 its reverse (131210301212), we get a palindrome (343313313343).

The spelling of 212103012131 in words is "two hundred twelve billion, one hundred three million, twelve thousand, one hundred thirty-one".