21100002021202 has 8 divisors (see below), whose sum is σ = 34084618649676. Its totient is φ = 9738462471312.

The previous prime is 21100002021191. The next prime is 21100002021209. The reversal of 21100002021202 is 20212020000112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20295484512601 + 804517508601 = 4505051^2 + 896949^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (21100002021209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405769269613 + ... + 405769269664.

Almost surely, 2^{21100002021202} is an apocalyptic number.

21100002021202 is a deficient number, since it is larger than the sum of its proper divisors (12984616628474).

21100002021202 is a wasteful number, since it uses less digits than its factorization.

21100002021202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811538539292.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21100002021202 its reverse (20212020000112), we get a palindrome (41312022021314).

The spelling of 21100002021202 in words is "twenty-one trillion, one hundred billion, two million, twenty-one thousand, two hundred two".