23140145401421 has 4 divisors (see below), whose sum is σ = 24501330425052. Its totient is φ = 21778960377792.

The previous prime is 23140145401411. The next prime is 23140145401423. The reversal of 23140145401421 is 12410454104132.

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 10444563558025 + 12695581843396 = 3231805^2 + 3563086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23140145401421 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 (23140145401423) 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, 680592511790 + ... + 680592511823.

It is an arithmetic number, because the mean of its divisors is an integer number (6125332606263).

Almost surely, 2^{23140145401421} is an apocalyptic number.

It is an amenable number.

23140145401421 is a deficient number, since it is larger than the sum of its proper divisors (1361185023631).

23140145401421 is a wasteful number, since it uses less digits than its factorization.

23140145401421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361185023630.

The product of its (nonzero) digits is 15360, while the sum is 32.

Adding to 23140145401421 its reverse (12410454104132), we get a palindrome (35550599505553).

The spelling of 23140145401421 in words is "twenty-three trillion, one hundred forty billion, one hundred forty-five million, four hundred one thousand, four hundred twenty-one".