20112401221 has 32 divisors (see below), whose sum is σ = 23219094528. Its totient is φ = 17242199040.

The previous prime is 20112401219. The next prime is 20112401237. The reversal of 20112401221 is 12210421102.

It is not a de Polignac number, because 20112401221 - 2¹ = 20112401219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112401195 and 20112401204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112401321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16525605 + ... + 16526821.

It is an arithmetic number, because the mean of its divisors is an integer number (725596704).

Almost surely, 2^20112401221 is an apocalyptic number.

It is an amenable number.

20112401221 is a deficient number, since it is larger than the sum of its proper divisors (3106693307).

20112401221 is a wasteful number, since it uses less digits than its factorization.

20112401221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20112401221 its reverse (12210421102), we get a palindrome (32322822323).

The spelling of 20112401221 in words is "twenty billion, one hundred twelve million, four hundred one thousand, two hundred twenty-one".