123022011421 has 4 divisors (see below), whose sum is σ = 123023481052. Its totient is φ = 123020541792.

The previous prime is 123022011347. The next prime is 123022011451. The reversal of 123022011421 is 124110220321.

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 35946264025 + 87075747396 = 189595^2 + 295086^2 .

It is a cyclic number.

It is not a de Polignac number, because 123022011421 - 2²³ = 123013622813 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 (123022011451) 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, 601146 + ... + 779371.

It is an arithmetic number, because the mean of its divisors is an integer number (30755870263).

Almost surely, 2^123022011421 is an apocalyptic number.

It is an amenable number.

123022011421 is a deficient number, since it is larger than the sum of its proper divisors (1469631).

123022011421 is an equidigital number, since it uses as much as digits as its factorization.

123022011421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469630.

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

Adding to 123022011421 its reverse (124110220321), we get a palindrome (247132231742).

The spelling of 123022011421 in words is "one hundred twenty-three billion, twenty-two million, eleven thousand, four hundred twenty-one".