21210502030 has 16 divisors (see below), whose sum is σ = 40424721840. Its totient is φ = 7985130112.

The previous prime is 21210501959. The next prime is 21210502063. The reversal of 21210502030 is 3020501212.

It is a junction number, because it is equal to n+sod(n) for n = 21210501995 and 21210502013.

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, 62383660 + ... + 62383999.

It is an arithmetic number, because the mean of its divisors is an integer number (2526545115).

Almost surely, 2^21210502030 is an apocalyptic number.

21210502030 is a deficient number, since it is larger than the sum of its proper divisors (19214219810).

21210502030 is a wasteful number, since it uses less digits than its factorization.

21210502030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124767683.

The product of its (nonzero) digits is 120, while the sum is 16.

The spelling of 21210502030 in words is "twenty-one billion, two hundred ten million, five hundred two thousand, thirty".