21101100112002 has 32 divisors (see below), whose sum is σ = 42233241960000. Its totient is φ = 7028528027328.

The previous prime is 21101100111991. The next prime is 21101100112009. The reversal of 21101100112002 is 20021100110112.

It is not an unprimeable number, because it can be changed into a prime (21101100112009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52997673 + ... + 53394339.

It is an arithmetic number, because the mean of its divisors is an integer number (1319788811250).

Almost surely, 2^{21101100112002} is an apocalyptic number.

21101100112002 is an abundant number, since it is smaller than the sum of its proper divisors (21132141847998).

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

21101100112002 is a wasteful number, since it uses less digits than its factorization.

21101100112002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403170.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21101100112002 its reverse (20021100110112), we get a palindrome (41122200222114).

The spelling of 21101100112002 in words is "twenty-one trillion, one hundred one billion, one hundred million, one hundred twelve thousand, two".