202011100021221 has 16 divisors (see below), whose sum is σ = 278076125826048. Its totient is φ = 130348183953600.

The previous prime is 202011100021201. The next prime is 202011100021223. The reversal of 202011100021221 is 122120001110202.

It is a de Polignac number, because none of the positive numbers 2^k-202011100021221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202011100021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202011100021223) 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, 4764166810 + ... + 4764209211.

It is an arithmetic number, because the mean of its divisors is an integer number (17379757864128).

Almost surely, 2^{202011100021221} is an apocalyptic number.

It is an amenable number.

202011100021221 is a deficient number, since it is larger than the sum of its proper divisors (76065025804827).

202011100021221 is a wasteful number, since it uses less digits than its factorization.

202011100021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9528376252.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 202011100021221 its reverse (122120001110202), we get a palindrome (324131101131423).

The spelling of 202011100021221 in words is "two hundred two trillion, eleven billion, one hundred million, twenty-one thousand, two hundred twenty-one".