30435121961 has 2 divisors, whose sum is σ = 30435121962. Its totient is φ = 30435121960.

The previous prime is 30435121957. The next prime is 30435121973. The reversal of 30435121961 is 16912153403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30391297561 + 43824400 = 174331^2 + 6620^2 .

It is a cyclic number.

It is not a de Polignac number, because 30435121961 - 2² = 30435121957 is a prime.

It is not a weakly prime, because it can be changed into another prime (30435121991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15217560980 + 15217560981.

It is an arithmetic number, because the mean of its divisors is an integer number (15217560981).

Almost surely, 2^30435121961 is an apocalyptic number.

It is an amenable number.

30435121961 is a deficient number, since it is larger than the sum of its proper divisors (1).

30435121961 is an equidigital number, since it uses as much as digits as its factorization.

30435121961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The spelling of 30435121961 in words is "thirty billion, four hundred thirty-five million, one hundred twenty-one thousand, nine hundred sixty-one".