21132021030 has 16 divisors (see below), whose sum is σ = 50716850544. Its totient is φ = 5635205600.

The previous prime is 21132021019. The next prime is 21132021047. The reversal of 21132021030 is 3012023112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352200321 + ... + 352200380.

It is an arithmetic number, because the mean of its divisors is an integer number (3169803159).

Almost surely, 2^21132021030 is an apocalyptic number.

21132021030 is an abundant number, since it is smaller than the sum of its proper divisors (29584829514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21132021030 is a wasteful number, since it uses less digits than its factorization.

21132021030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704400711.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21132021030 its reverse (3012023112), we get a palindrome (24144044142).

The spelling of 21132021030 in words is "twenty-one billion, one hundred thirty-two million, twenty-one thousand, thirty".