21112002221210 has 8 divisors (see below), whose sum is σ = 38001603998196. Its totient is φ = 8444800888480.

The previous prime is 21112002221201. The next prime is 21112002221269. The reversal of 21112002221210 is 1212220021112.

It can be written as a sum of positive squares in 2 ways, for example, as 20276315543929 + 835686677281 = 4502923^2 + 914159^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055600111051 + ... + 1055600111070.

Almost surely, 2^{21112002221210} is an apocalyptic number.

21112002221210 is a deficient number, since it is larger than the sum of its proper divisors (16889601776986).

21112002221210 is a wasteful number, since it uses less digits than its factorization.

21112002221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111200222128.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21112002221210 its reverse (1212220021112), we get a palindrome (22324222242322).

The spelling of 21112002221210 in words is "twenty-one trillion, one hundred twelve billion, two million, two hundred twenty-one thousand, two hundred ten".