122402020113521 has 2 divisors, whose sum is σ = 122402020113522. Its totient is φ = 122402020113520.

The previous prime is 122402020113517. The next prime is 122402020113589. The reversal of 122402020113521 is 125311020204221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122379680626225 + 22339487296 = 11062535^2 + 149464^2 .

It is an emirp because it is prime and its reverse (125311020204221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122402020113521 - 2² = 122402020113517 is a prime.

It is not a weakly prime, because it can be changed into another prime (122402820113521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61201010056760 + 61201010056761.

It is an arithmetic number, because the mean of its divisors is an integer number (61201010056761).

Almost surely, 2^{122402020113521} is an apocalyptic number.

It is an amenable number.

122402020113521 is a deficient number, since it is larger than the sum of its proper divisors (1).

122402020113521 is an equidigital number, since it uses as much as digits as its factorization.

122402020113521 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 26.

Adding to 122402020113521 its reverse (125311020204221), we get a palindrome (247713040317742).

The spelling of 122402020113521 in words is "one hundred twenty-two trillion, four hundred two billion, twenty million, one hundred thirteen thousand, five hundred twenty-one".