20412211321 has 12 divisors (see below), whose sum is σ = 21927223260. Its totient is φ = 18995609600.

The previous prime is 20412211307. The next prime is 20412211363. The reversal of 20412211321 is 12311221402.

It can be written as a sum of positive squares in 6 ways, for example, as 423906921 + 19988304400 = 20589^2 + 141380^2 .

It is not a de Polignac number, because 20412211321 - 2²³ = 20403822713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20412212321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 371080 + ... + 422521.

It is an arithmetic number, because the mean of its divisors is an integer number (1827268605).

Almost surely, 2^20412211321 is an apocalyptic number.

It is an amenable number.

20412211321 is a deficient number, since it is larger than the sum of its proper divisors (1515011939).

20412211321 is an equidigital number, since it uses as much as digits as its factorization.

20412211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793724 (or 793707 counting only the distinct ones).

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

Adding to 20412211321 its reverse (12311221402), we get a palindrome (32723432723).

The spelling of 20412211321 in words is "twenty billion, four hundred twelve million, two hundred eleven thousand, three hundred twenty-one".