21100102011202 has 4 divisors (see below), whose sum is σ = 31650153016806. Its totient is φ = 10550051005600.

The previous prime is 21100102011089. The next prime is 21100102011203. The reversal of 21100102011202 is 20211020100112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16132601604681 + 4967500406521 = 4016541^2 + 2228789^2 .

It is not an unprimeable number, because it can be changed into a prime (21100102011203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275025502799 + ... + 5275025502802.

Almost surely, 2^{21100102011202} is an apocalyptic number.

21100102011202 is a deficient number, since it is larger than the sum of its proper divisors (10550051005604).

21100102011202 is a wasteful number, since it uses less digits than its factorization.

21100102011202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10550051005603.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21100102011202 its reverse (20211020100112), we get a palindrome (41311122111314).

The spelling of 21100102011202 in words is "twenty-one trillion, one hundred billion, one hundred two million, eleven thousand, two hundred two".