21111002100002 has 16 divisors (see below), whose sum is σ = 32745250247424. Its totient is φ = 10197111330000.

The previous prime is 21111002099989. The next prime is 21111002100007. The reversal of 21111002100002 is 20000120011112.

It is not an unprimeable number, because it can be changed into a prime (21111002100007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298125749 + ... + 298196552.

It is an arithmetic number, because the mean of its divisors is an integer number (2046578140464).

Almost surely, 2^{21111002100002} is an apocalyptic number.

21111002100002 is a deficient number, since it is larger than the sum of its proper divisors (11634248147422).

21111002100002 is a wasteful number, since it uses less digits than its factorization.

21111002100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596322905.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21111002100002 its reverse (20000120011112), we get a palindrome (41111122111114).

The spelling of 21111002100002 in words is "twenty-one trillion, one hundred eleven billion, two million, one hundred thousand, two".