2131212231139 has 2 divisors, whose sum is σ = 2131212231140. Its totient is φ = 2131212231138.

The previous prime is 2131212231121. The next prime is 2131212231223. The reversal of 2131212231139 is 9311322121312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2131212231139 - 2⁵ = 2131212231107 is a prime.

It is a super-2 number, since 2×2131212231139² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2131212231139.

It is not a weakly prime, because it can be changed into another prime (2131212231839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065606115569 + 1065606115570.

It is an arithmetic number, because the mean of its divisors is an integer number (1065606115570).

Almost surely, 2^{2131212231139} is an apocalyptic number.

2131212231139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131212231139 is an equidigital number, since it uses as much as digits as its factorization.

2131212231139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The spelling of 2131212231139 in words is "two trillion, one hundred thirty-one billion, two hundred twelve million, two hundred thirty-one thousand, one hundred thirty-nine".