21101112002 has 16 divisors (see below), whose sum is σ = 31723115424. Its totient is φ = 10526760000.

The previous prime is 21101111981. The next prime is 21101112007. The reversal of 21101112002 is 20021110112.

It is not an unprimeable number, because it can be changed into a prime (21101112007) 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, 3252602 + ... + 3259082.

It is an arithmetic number, because the mean of its divisors is an integer number (1982694714).

Almost surely, 2^21101112002 is an apocalyptic number.

21101112002 is a deficient number, since it is larger than the sum of its proper divisors (10622003422).

21101112002 is a wasteful number, since it uses less digits than its factorization.

21101112002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9905.

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

Adding to 21101112002 its reverse (20021110112), we get a palindrome (41122222114).

The spelling of 21101112002 in words is "twenty-one billion, one hundred one million, one hundred twelve thousand, two".