1212310431123 has 16 divisors (see below), whose sum is σ = 1779538252800. Its totient is φ = 727992917280.

The previous prime is 1212310431109. The next prime is 1212310431149. The reversal of 1212310431123 is 3211340132121.

It is not a de Polignac number, because 1212310431123 - 2⁵ = 1212310431091 is a prime.

It is a super-2 number, since 2×1212310431123² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212310431093 and 1212310431102.

It is not an unprimeable number, because it can be changed into a prime (1212310431023) 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, 168513283 + ... + 168520476.

It is an arithmetic number, because the mean of its divisors is an integer number (111221140800).

Almost surely, 2^{1212310431123} is an apocalyptic number.

1212310431123 is a deficient number, since it is larger than the sum of its proper divisors (567227821677).

1212310431123 is a wasteful number, since it uses less digits than its factorization.

1212310431123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337033882.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 1212310431123 its reverse (3211340132121), we get a palindrome (4423650563244).

The spelling of 1212310431123 in words is "one trillion, two hundred twelve billion, three hundred ten million, four hundred thirty-one thousand, one hundred twenty-three".