21112021001210 has 8 divisors (see below), whose sum is σ = 38001637802196. Its totient is φ = 8444808400480.

The previous prime is 21112021001207. The next prime is 21112021001257. The reversal of 21112021001210 is 1210012021112.

It can be written as a sum of positive squares in 2 ways, for example, as 20829557451481 + 282463549729 = 4563941^2 + 531473^2 .

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, 1055601050051 + ... + 1055601050070.

Almost surely, 2^{21112021001210} is an apocalyptic number.

21112021001210 is a deficient number, since it is larger than the sum of its proper divisors (16889616800986).

21112021001210 is a wasteful number, since it uses less digits than its factorization.

21112021001210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111202100128.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21112021001210 its reverse (1210012021112), we get a palindrome (22322033022322).

The spelling of 21112021001210 in words is "twenty-one trillion, one hundred twelve billion, twenty-one million, one thousand, two hundred ten".