1213102424021 has 2 divisors, whose sum is σ = 1213102424022. Its totient is φ = 1213102424020.

The previous prime is 1213102423999. The next prime is 1213102424047. The reversal of 1213102424021 is 1204242013121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1202027176900 + 11075247121 = 1096370^2 + 105239^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213102424021 - 2³⁰ = 1212028682197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213102424071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606551212010 + 606551212011.

It is an arithmetic number, because the mean of its divisors is an integer number (606551212011).

Almost surely, 2^{1213102424021} is an apocalyptic number.

It is an amenable number.

1213102424021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213102424021 is an equidigital number, since it uses as much as digits as its factorization.

1213102424021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1213102424021 its reverse (1204242013121), we get a palindrome (2417344437142).

The spelling of 1213102424021 in words is "one trillion, two hundred thirteen billion, one hundred two million, four hundred twenty-four thousand, twenty-one".