21001120101202 has 16 divisors (see below), whose sum is σ = 31714555145112. Its totient is φ = 10429653312000.

The previous prime is 21001120101193. The next prime is 21001120101223. The reversal of 21001120101202 is 20210102110012.

It can be written as a sum of positive squares in 4 ways, for example, as 20475453050361 + 525667050841 = 4524981^2 + 725029^2 .

It is a super-2 number, since 2×21001120101202² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12082549 + ... + 13710952.

Almost surely, 2^{21001120101202} is an apocalyptic number.

21001120101202 is a deficient number, since it is larger than the sum of its proper divisors (10713435043910).

21001120101202 is a wasteful number, since it uses less digits than its factorization.

21001120101202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25796253.

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

Adding to 21001120101202 its reverse (20210102110012), we get a palindrome (41211222211214).

The spelling of 21001120101202 in words is "twenty-one trillion, one billion, one hundred twenty million, one hundred one thousand, two hundred two".