21100120212202 has 8 divisors (see below), whose sum is σ = 31657981705956. Its totient is φ = 10547459643552.

The previous prime is 21100120212173. The next prime is 21100120212221. The reversal of 21100120212202 is 20221202100112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19388002918761 + 1712117293441 = 4403181^2 + 1308479^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1300221133 + ... + 1300237360.

Almost surely, 2^{21100120212202} is an apocalyptic number.

21100120212202 is a deficient number, since it is larger than the sum of its proper divisors (10557861493754).

21100120212202 is a wasteful number, since it uses less digits than its factorization.

21100120212202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600462552.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21100120212202 its reverse (20221202100112), we get a palindrome (41321322312314).

The spelling of 21100120212202 in words is "twenty-one trillion, one hundred billion, one hundred twenty million, two hundred twelve thousand, two hundred two".