21023122030 has 16 divisors (see below), whose sum is σ = 37982299680. Its totient is φ = 8377986592.

The previous prime is 21023122007. The next prime is 21023122069. The reversal of 21023122030 is 3022132012.

It is a junction number, because it is equal to n+sod(n) for n = 21023121995 and 21023122013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3904954 + ... + 3910333.

It is an arithmetic number, because the mean of its divisors is an integer number (2373893730).

Almost surely, 2^21023122030 is an apocalyptic number.

21023122030 is a deficient number, since it is larger than the sum of its proper divisors (16959177650).

21023122030 is a wasteful number, since it uses less digits than its factorization.

21023122030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7815563.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21023122030 its reverse (3022132012), we get a palindrome (24045254042).

The spelling of 21023122030 in words is "twenty-one billion, twenty-three million, one hundred twenty-two thousand, thirty".