1231121111132 has 48 divisors (see below), whose sum is σ = 2455440916320. Its totient is φ = 534954336000.

The previous prime is 1231121111131. The next prime is 1231121111167. The reversal of 1231121111132 is 2311111211321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231121111131) 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, 4647503 + ... + 4905254.

It is an arithmetic number, because the mean of its divisors is an integer number (51155019090).

Almost surely, 2^{1231121111132} is an apocalyptic number.

It is an amenable number.

1231121111132 is a deficient number, since it is larger than the sum of its proper divisors (1224319805188).

1231121111132 is a wasteful number, since it uses less digits than its factorization.

1231121111132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9552902 (or 9552900 counting only the distinct ones).

The product of its digits is 72, while the sum is 20.

Adding to 1231121111132 its reverse (2311111211321), we get a palindrome (3542232322453).

The spelling of 1231121111132 in words is "one trillion, two hundred thirty-one billion, one hundred twenty-one million, one hundred eleven thousand, one hundred thirty-two".