202112000001221 has 4 divisors (see below), whose sum is σ = 202112029080000. Its totient is φ = 202111970922444.

The previous prime is 202112000001193. The next prime is 202112000001257. The reversal of 202112000001221 is 122100000211202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 202112000001221 - 2³⁰ = 202110926259397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202112000001196 and 202112000001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202112000001421) 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, 2699780 + ... + 20285778.

It is an arithmetic number, because the mean of its divisors is an integer number (50528007270000).

Almost surely, 2^{202112000001221} is an apocalyptic number.

It is an amenable number.

202112000001221 is a deficient number, since it is larger than the sum of its proper divisors (29078779).

202112000001221 is a wasteful number, since it uses less digits than its factorization.

202112000001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29078778.

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

Adding to 202112000001221 its reverse (122100000211202), we get a palindrome (324212000212423).

The spelling of 202112000001221 in words is "two hundred two trillion, one hundred twelve billion, one thousand, two hundred twenty-one".