1212901623091 has 2 divisors, whose sum is σ = 1212901623092. Its totient is φ = 1212901623090.

The previous prime is 1212901623041. The next prime is 1212901623149. The reversal of 1212901623091 is 1903261092121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212901623091 - 2³³ = 1204311688499 is a prime.

It is a super-2 number, since 2×1212901623091² (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 1212901623091.

It is not a weakly prime, because it can be changed into another prime (1212901623041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606450811545 + 606450811546.

It is an arithmetic number, because the mean of its divisors is an integer number (606450811546).

Almost surely, 2^{1212901623091} is an apocalyptic number.

1212901623091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212901623091 is an equidigital number, since it uses as much as digits as its factorization.

1212901623091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 37.

The spelling of 1212901623091 in words is "one trillion, two hundred twelve billion, nine hundred one million, six hundred twenty-three thousand, ninety-one".