1231210031287 has 2 divisors, whose sum is σ = 1231210031288. Its totient is φ = 1231210031286.

The previous prime is 1231210031281. The next prime is 1231210031333. The reversal of 1231210031287 is 7821300121321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231210031287 - 2⁷ = 1231210031159 is a prime.

It is a super-2 number, since 2×1231210031287² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231210031281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615605015643 + 615605015644.

It is an arithmetic number, because the mean of its divisors is an integer number (615605015644).

Almost surely, 2^{1231210031287} is an apocalyptic number.

1231210031287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231210031287 is an equidigital number, since it uses as much as digits as its factorization.

1231210031287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The spelling of 1231210031287 in words is "one trillion, two hundred thirty-one billion, two hundred ten million, thirty-one thousand, two hundred eighty-seven".