21120210212202 has 12 divisors (see below), whose sum is σ = 45760455459810. Its totient is φ = 7040070070728.

The previous prime is 21120210212137. The next prime is 21120210212209. The reversal of 21120210212202 is 20221201202112.

It is a happy number.

21120210212202 is a `hidden beast` number, since 21 + 1 + 20 + 210 + 212 + 202 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14822815701681 + 6297394510521 = 3850041^2 + 2509461^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1173345011789 = 21120210212202 / (2 + 1 + 1 + 2 + 0 + 2 + 1 + 0 + 2 + 1 + 2 + 2 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (21120210212209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 586672505877 + ... + 586672505912.

Almost surely, 2^{21120210212202} is an apocalyptic number.

21120210212202 is an abundant number, since it is smaller than the sum of its proper divisors (24640245247608).

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

21120210212202 is a wasteful number, since it uses less digits than its factorization.

21120210212202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173345011797 (or 1173345011794 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21120210212202 its reverse (20221201202112), we get a palindrome (41341411414314).

The spelling of 21120210212202 in words is "twenty-one trillion, one hundred twenty billion, two hundred ten million, two hundred twelve thousand, two hundred two".