21021130103202 has 24 divisors (see below), whose sum is σ = 46656654620940. Its totient is φ = 6836139870720.

The previous prime is 21021130103189. The next prime is 21021130103213. The reversal of 21021130103202 is 20230103112012.

21021130103202 is a `hidden beast` number, since 21 + 0 + 21 + 1 + 301 + 0 + 320 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19401901848081 + 1619228255121 = 4404759^2 + 1272489^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14241957327 + ... + 14241958802.

Almost surely, 2^{21021130103202} is an apocalyptic number.

21021130103202 is an abundant number, since it is smaller than the sum of its proper divisors (25635524517738).

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

21021130103202 is a wasteful number, since it uses less digits than its factorization.

21021130103202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28483916178 (or 28483916175 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21021130103202 its reverse (20230103112012), we get a palindrome (41251233215214).

The spelling of 21021130103202 in words is "twenty-one trillion, twenty-one billion, one hundred thirty million, one hundred three thousand, two hundred two".