1321211031293 has 2 divisors, whose sum is σ = 1321211031294. Its totient is φ = 1321211031292.

The previous prime is 1321211031289. The next prime is 1321211031307. The reversal of 1321211031293 is 3921301121231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1300918174084 + 20292857209 = 1140578^2 + 142453^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321211031293 - 2² = 1321211031289 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321211031223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660605515646 + 660605515647.

It is an arithmetic number, because the mean of its divisors is an integer number (660605515647).

Almost surely, 2^{1321211031293} is an apocalyptic number.

It is an amenable number.

1321211031293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321211031293 is an equidigital number, since it uses as much as digits as its factorization.

1321211031293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 1321211031293 in words is "one trillion, three hundred twenty-one billion, two hundred eleven million, thirty-one thousand, two hundred ninety-three".