202212100100021 has 16 divisors (see below), whose sum is σ = 220735985476608. Its totient is φ = 183711746790000.

The previous prime is 202212100099979. The next prime is 202212100100047. The reversal of 202212100100021 is 120001001212202.

It is a de Polignac number, because none of the positive numbers 2^k-202212100100021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202212100099969 and 202212100100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202212100100821) 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, 107170250 + ... + 109040756.

It is an arithmetic number, because the mean of its divisors is an integer number (13795999092288).

Almost surely, 2^{202212100100021} is an apocalyptic number.

It is an amenable number.

202212100100021 is a deficient number, since it is larger than the sum of its proper divisors (18523885376587).

202212100100021 is a wasteful number, since it uses less digits than its factorization.

202212100100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876792.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 202212100100021 its reverse (120001001212202), we get a palindrome (322213101312223).

The spelling of 202212100100021 in words is "two hundred two trillion, two hundred twelve billion, one hundred million, one hundred thousand, twenty-one".