3121400123 has 16 divisors (see below), whose sum is σ = 3402604800. Its totient is φ = 2852105760.

The previous prime is 3121400101. The next prime is 3121400131. The reversal of 3121400123 is 3210041213.

3121400123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 3121400123 - 2⁶ = 3121400059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3121400423) 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, 638378 + ... + 643248.

It is an arithmetic number, because the mean of its divisors is an integer number (212662800).

Almost surely, 2^3121400123 is an apocalyptic number.

3121400123 is a deficient number, since it is larger than the sum of its proper divisors (281204677).

3121400123 is a wasteful number, since it uses less digits than its factorization.

3121400123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6082.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 3121400123 is about 55869.4918806320. The cubic root of 3121400123 is about 1461.4472611769.

Adding to 3121400123 its reverse (3210041213), we get a palindrome (6331441336).

The spelling of 3121400123 in words is "three billion, one hundred twenty-one million, four hundred thousand, one hundred twenty-three".