1234420015021 has 2 divisors, whose sum is σ = 1234420015022. Its totient is φ = 1234420015020.

The previous prime is 1234420015019. The next prime is 1234420015117. The reversal of 1234420015021 is 1205100244321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 805380604900 + 429039410121 = 897430^2 + 655011^2 .

It is a cyclic number.

It is not a de Polignac number, because 1234420015021 - 2¹ = 1234420015019 is a prime.

Together with 1234420015019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1234424015021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617210007510 + 617210007511.

It is an arithmetic number, because the mean of its divisors is an integer number (617210007511).

Almost surely, 2^{1234420015021} is an apocalyptic number.

It is an amenable number.

1234420015021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234420015021 is an equidigital number, since it uses as much as digits as its factorization.

1234420015021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 1234420015021 its reverse (1205100244321), we get a palindrome (2439520259342).

The spelling of 1234420015021 in words is "one trillion, two hundred thirty-four billion, four hundred twenty million, fifteen thousand, twenty-one".