121111131231123 has 32 divisors (see below), whose sum is σ = 176236844236800. Its totient is φ = 73369356055200.

The previous prime is 121111131231121. The next prime is 121111131231133. The reversal of 121111131231123 is 321132131111121.

It is not a de Polignac number, because 121111131231123 - 2¹ = 121111131231121 is a prime.

It is a super-2 number, since 2×121111131231123² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121111131231093 and 121111131231102.

It is not an unprimeable number, because it can be changed into a prime (121111131231121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2188503588 + ... + 2188558926.

It is an arithmetic number, because the mean of its divisors is an integer number (5507401382400).

Almost surely, 2^{121111131231123} is an apocalyptic number.

121111131231123 is a deficient number, since it is larger than the sum of its proper divisors (55125713005677).

121111131231123 is a wasteful number, since it uses less digits than its factorization.

121111131231123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82463.

The product of its digits is 216, while the sum is 24.

Adding to 121111131231123 its reverse (321132131111121), we get a palindrome (442243262342244).

The spelling of 121111131231123 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred thirty-one million, two hundred thirty-one thousand, one hundred twenty-three".