1231414642421 has 2 divisors, whose sum is σ = 1231414642422. Its totient is φ = 1231414642420.

The previous prime is 1231414642417. The next prime is 1231414642477. The reversal of 1231414642421 is 1242464141321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 891541966225 + 339872676196 = 944215^2 + 582986^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231414642421 - 2² = 1231414642417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231414642481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615707321210 + 615707321211.

It is an arithmetic number, because the mean of its divisors is an integer number (615707321211).

Almost surely, 2^{1231414642421} is an apocalyptic number.

It is an amenable number.

1231414642421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231414642421 is an equidigital number, since it uses as much as digits as its factorization.

1231414642421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 35.

Adding to 1231414642421 its reverse (1242464141321), we get a palindrome (2473878783742).

The spelling of 1231414642421 in words is "one trillion, two hundred thirty-one billion, four hundred fourteen million, six hundred forty-two thousand, four hundred twenty-one".