23210011421 has 4 divisors (see below), whose sum is σ = 23212312092. Its totient is φ = 23207710752.

The previous prime is 23210011397. The next prime is 23210011423. The reversal of 23210011421 is 12411001232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21087105796 + 2122905625 = 145214^2 + 46075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23210011421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23210011421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23210011423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1135136 + ... + 1155401.

It is an arithmetic number, because the mean of its divisors is an integer number (5803078023).

Almost surely, 2^23210011421 is an apocalyptic number.

It is an amenable number.

23210011421 is a deficient number, since it is larger than the sum of its proper divisors (2300671).

23210011421 is a wasteful number, since it uses less digits than its factorization.

23210011421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300670.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 23210011421 its reverse (12411001232), we get a palindrome (35621012653).

The spelling of 23210011421 in words is "twenty-three billion, two hundred ten million, eleven thousand, four hundred twenty-one".