20412311221 has 8 divisors (see below), whose sum is σ = 20541384864. Its totient is φ = 20283495120.

The previous prime is 20412311203. The next prime is 20412311251. The reversal of 20412311221 is 12211321402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20412311221 - 2²³ = 20403922613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20412311251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95886 + ... + 223648.

It is an arithmetic number, because the mean of its divisors is an integer number (2567673108).

Almost surely, 2^20412311221 is an apocalyptic number.

It is an amenable number.

20412311221 is a deficient number, since it is larger than the sum of its proper divisors (129073643).

20412311221 is a wasteful number, since it uses less digits than its factorization.

20412311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128771.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20412311221 its reverse (12211321402), we get a palindrome (32623632623).

The spelling of 20412311221 in words is "twenty billion, four hundred twelve million, three hundred eleven thousand, two hundred twenty-one".