30475721055121 has 2 divisors, whose sum is σ = 30475721055122. Its totient is φ = 30475721055120.

The previous prime is 30475721055119. The next prime is 30475721055179. The reversal of 30475721055121 is 12155012757403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23178639936400 + 7297081118721 = 4814420^2 + 2701311^2 .

It is a cyclic number.

It is not a de Polignac number, because 30475721055121 - 2¹ = 30475721055119 is a prime.

Together with 30475721055119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30475721055821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15237860527560 + 15237860527561.

It is an arithmetic number, because the mean of its divisors is an integer number (15237860527561).

Almost surely, 2^{30475721055121} is an apocalyptic number.

It is an amenable number.

30475721055121 is a deficient number, since it is larger than the sum of its proper divisors (1).

30475721055121 is an equidigital number, since it uses as much as digits as its factorization.

30475721055121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294000, while the sum is 43.

The spelling of 30475721055121 in words is "thirty trillion, four hundred seventy-five billion, seven hundred twenty-one million, fifty-five thousand, one hundred twenty-one".