21021022030 has 8 divisors (see below), whose sum is σ = 37837839672. Its totient is φ = 8408408808.

The previous prime is 21021021979. The next prime is 21021022049. The reversal of 21021022030 is 3022012012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21021022030.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051051092 + ... + 1051051111.

It is an arithmetic number, because the mean of its divisors is an integer number (4729729959).

Almost surely, 2^21021022030 is an apocalyptic number.

21021022030 is a deficient number, since it is larger than the sum of its proper divisors (16816817642).

21021022030 is a wasteful number, since it uses less digits than its factorization.

21021022030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102102210.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21021022030 its reverse (3022012012), we get a palindrome (24043034042).

The spelling of 21021022030 in words is "twenty-one billion, twenty-one million, twenty-two thousand, thirty".