21100212101002 has 4 divisors (see below), whose sum is σ = 31650318151506. Its totient is φ = 10550106050500.

The previous prime is 21100212100991. The next prime is 21100212101053. The reversal of 21100212101002 is 20010121200112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20497540911241 + 602671189761 = 4527421^2 + 776319^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275053025249 + ... + 5275053025252.

Almost surely, 2^{21100212101002} is an apocalyptic number.

21100212101002 is a deficient number, since it is larger than the sum of its proper divisors (10550106050504).

21100212101002 is a wasteful number, since it uses less digits than its factorization.

21100212101002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10550106050503.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21100212101002 its reverse (20010121200112), we get a palindrome (41110333301114).

The spelling of 21100212101002 in words is "twenty-one trillion, one hundred billion, two hundred twelve million, one hundred one thousand, two".