30421020021 has 16 divisors (see below), whose sum is σ = 46422947328. Its totient is φ = 17358274800.

The previous prime is 30421020013. The next prime is 30421020079. The reversal of 30421020021 is 12002012403.

It is not a de Polignac number, because 30421020021 - 2³ = 30421020013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30421021021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1033695 + ... + 1062716.

It is an arithmetic number, because the mean of its divisors is an integer number (2901434208).

Almost surely, 2^30421020021 is an apocalyptic number.

It is an amenable number.

30421020021 is a deficient number, since it is larger than the sum of its proper divisors (16001927307).

30421020021 is a wasteful number, since it uses less digits than its factorization.

30421020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097112.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 30421020021 its reverse (12002012403), we get a palindrome (42423032424).

The spelling of 30421020021 in words is "thirty billion, four hundred twenty-one million, twenty thousand, twenty-one".