23421221121 has 16 divisors (see below), whose sum is σ = 31642490880. Its totient is φ = 15407501520.

The previous prime is 23421221107. The next prime is 23421221281. The reversal of 23421221121 is 12112212432.

It is a happy number.

It is not a de Polignac number, because 23421221121 - 2⁷ = 23421220993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23421221821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152856 + ... + 264966.

It is an arithmetic number, because the mean of its divisors is an integer number (1977655680).

Almost surely, 2^23421221121 is an apocalyptic number.

It is an amenable number.

23421221121 is a deficient number, since it is larger than the sum of its proper divisors (8221269759).

23421221121 is a wasteful number, since it uses less digits than its factorization.

23421221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113036.

The product of its digits is 384, while the sum is 21.

Adding to 23421221121 its reverse (12112212432), we get a palindrome (35533433553).

The spelling of 23421221121 in words is "twenty-three billion, four hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-one".