31212230121123 has 32 divisors (see below), whose sum is σ = 42294963122496. Its totient is φ = 20471409573888.

The previous prime is 31212230121077. The next prime is 31212230121131. The reversal of 31212230121123 is 32112103221213.

It is not a de Polignac number, because 31212230121123 - 2⁹ = 31212230120611 is a prime.

It is a super-2 number, since 2×31212230121123² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31212230121093 and 31212230121102.

It is not an unprimeable number, because it can be changed into a prime (31212230121143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 348177715 + ... + 348267347.

It is an arithmetic number, because the mean of its divisors is an integer number (1321717597578).

Almost surely, 2^{31212230121123} is an apocalyptic number.

31212230121123 is a deficient number, since it is larger than the sum of its proper divisors (11082733001373).

31212230121123 is a wasteful number, since it uses less digits than its factorization.

31212230121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96823.

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

Adding to 31212230121123 its reverse (32112103221213), we get a palindrome (63324333342336).

The spelling of 31212230121123 in words is "thirty-one trillion, two hundred twelve billion, two hundred thirty million, one hundred twenty-one thousand, one hundred twenty-three".