123013212121 has 8 divisors (see below), whose sum is σ = 129033667584. Its totient is φ = 117048761280.

The previous prime is 123013212107. The next prime is 123013212131. The reversal of 123013212121 is 121212310321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123013212121 - 2⁵ = 123013212089 is a prime.

It is a super-2 number, since 2×123013212121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123013212131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13996656 + ... + 14005441.

It is an arithmetic number, because the mean of its divisors is an integer number (16129208448).

Almost surely, 2^123013212121 is an apocalyptic number.

It is an amenable number.

123013212121 is a deficient number, since it is larger than the sum of its proper divisors (6020455463).

123013212121 is a wasteful number, since it uses less digits than its factorization.

123013212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28002311.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 123013212121 its reverse (121212310321), we get a palindrome (244225522442).

The spelling of 123013212121 in words is "one hundred twenty-three billion, thirteen million, two hundred twelve thousand, one hundred twenty-one".