2131139583421 has 2 divisors, whose sum is σ = 2131139583422. Its totient is φ = 2131139583420.

The previous prime is 2131139583347. The next prime is 2131139583449. The reversal of 2131139583421 is 1243859311312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1801044520900 + 330095062521 = 1342030^2 + 574539^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131139583421 - 2³⁹ = 1581383769533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131139583121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065569791710 + 1065569791711.

It is an arithmetic number, because the mean of its divisors is an integer number (1065569791711).

Almost surely, 2^{2131139583421} is an apocalyptic number.

It is an amenable number.

2131139583421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131139583421 is an equidigital number, since it uses as much as digits as its factorization.

2131139583421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The spelling of 2131139583421 in words is "two trillion, one hundred thirty-one billion, one hundred thirty-nine million, five hundred eighty-three thousand, four hundred twenty-one".