21110212002 has 24 divisors (see below), whose sum is σ = 46407575088. Its totient is φ = 6397033720.

The previous prime is 21110211973. The next prime is 21110212003. The reversal of 21110212002 is 20021201112.

It is not an unprimeable number, because it can be changed into a prime (21110212003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14537988 + ... + 14539439.

It is an arithmetic number, because the mean of its divisors is an integer number (1933648962).

Almost surely, 2^21110212002 is an apocalyptic number.

21110212002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21110212002 is an abundant number, since it is smaller than the sum of its proper divisors (25297363086).

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

21110212002 is a wasteful number, since it uses less digits than its factorization.

21110212002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29077454 (or 29077443 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21110212002 its reverse (20021201112), we get a palindrome (41131413114).

The spelling of 21110212002 in words is "twenty-one billion, one hundred ten million, two hundred twelve thousand, two".