1231232021113 has 2 divisors, whose sum is σ = 1231232021114. Its totient is φ = 1231232021112.

The previous prime is 1231232021093. The next prime is 1231232021143. The reversal of 1231232021113 is 3111202321321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 737034269049 + 494197752064 = 858507^2 + 702992^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231232021113 - 2¹³ = 1231232012921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231232021143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615616010556 + 615616010557.

It is an arithmetic number, because the mean of its divisors is an integer number (615616010557).

Almost surely, 2^{1231232021113} is an apocalyptic number.

It is an amenable number.

1231232021113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231232021113 is an equidigital number, since it uses as much as digits as its factorization.

1231232021113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1231232021113 its reverse (3111202321321), we get a palindrome (4342434342434).

The spelling of 1231232021113 in words is "one trillion, two hundred thirty-one billion, two hundred thirty-two million, twenty-one thousand, one hundred thirteen".