21021322030 has 16 divisors (see below), whose sum is σ = 39829873680. Its totient is φ = 7965974592.

The previous prime is 21021322027. The next prime is 21021322033. The reversal of 21021322030 is 3022312012.

It is an interprime number because it is at equal distance from previous prime (21021322027) and next prime (21021322033).

It is a junction number, because it is equal to n+sod(n) for n = 21021321995 and 21021322013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021322033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55319079 + ... + 55319458.

It is an arithmetic number, because the mean of its divisors is an integer number (2489367105).

Almost surely, 2^21021322030 is an apocalyptic number.

21021322030 is a deficient number, since it is larger than the sum of its proper divisors (18808551650).

21021322030 is a wasteful number, since it uses less digits than its factorization.

21021322030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110638563.

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

Adding to 21021322030 its reverse (3022312012), we get a palindrome (24043634042).

The spelling of 21021322030 in words is "twenty-one billion, twenty-one million, three hundred twenty-two thousand, thirty".