21100213002 has 16 divisors (see below), whose sum is σ = 46036828512. Its totient is φ = 6394003920.

The previous prime is 21100212997. The next prime is 21100213003. The reversal of 21100213002 is 20031200112.

It is not an unprimeable number, because it can be changed into a prime (21100213003) 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, 159850033 + ... + 159850164.

It is an arithmetic number, because the mean of its divisors is an integer number (2877301782).

Almost surely, 2^21100213002 is an apocalyptic number.

21100213002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21100213002 is an abundant number, since it is smaller than the sum of its proper divisors (24936615510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21100213002 is a wasteful number, since it uses less digits than its factorization.

21100213002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319700213.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21100213002 its reverse (20031200112), we get a palindrome (41131413114).

The spelling of 21100213002 in words is "twenty-one billion, one hundred million, two hundred thirteen thousand, two".