20112211201221 has 24 divisors (see below), whose sum is σ = 29988411175424. Its totient is φ = 12975485424480.

The previous prime is 20112211201213. The next prime is 20112211201309. The reversal of 20112211201221 is 12210211221102.

20112211201221 is a `hidden beast` number, since 20 + 1 + 1 + 221 + 1 + 201 + 221 = 666.

It is not a de Polignac number, because 20112211201221 - 2³ = 20112211201213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112211201194 and 20112211201203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112211201721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31365000 + ... + 31999806.

Almost surely, 2^{20112211201221} is an apocalyptic number.

It is an amenable number.

20112211201221 is a deficient number, since it is larger than the sum of its proper divisors (9876199974203).

20112211201221 is a wasteful number, since it uses less digits than its factorization.

20112211201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748401 (or 748398 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20112211201221 its reverse (12210211221102), we get a palindrome (32322422422323).

The spelling of 20112211201221 in words is "twenty trillion, one hundred twelve billion, two hundred eleven million, two hundred one thousand, two hundred twenty-one".