30202039921 has 2 divisors, whose sum is σ = 30202039922. Its totient is φ = 30202039920.

The previous prime is 30202039897. The next prime is 30202039939. The reversal of 30202039921 is 12993020203.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30187325025 + 14714896 = 173745^2 + 3836^2 .

It is a cyclic number.

It is not a de Polignac number, because 30202039921 - 2⁷ = 30202039793 is a prime.

It is not a weakly prime, because it can be changed into another prime (30202039981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15101019960 + 15101019961.

It is an arithmetic number, because the mean of its divisors is an integer number (15101019961).

Almost surely, 2^30202039921 is an apocalyptic number.

It is an amenable number.

30202039921 is a deficient number, since it is larger than the sum of its proper divisors (1).

30202039921 is an equidigital number, since it uses as much as digits as its factorization.

30202039921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The spelling of 30202039921 in words is "thirty billion, two hundred two million, thirty-nine thousand, nine hundred twenty-one".