1231212111332 has 48 divisors (see below), whose sum is σ = 2487630093312. Its totient is φ = 522266430240.

The previous prime is 1231212111287. The next prime is 1231212111347. The reversal of 1231212111332 is 2331112121321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1231212111298 and 1231212111307.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5458463 + ... + 5679545.

It is an arithmetic number, because the mean of its divisors is an integer number (51825626944).

Almost surely, 2^{1231212111332} is an apocalyptic number.

It is an amenable number.

1231212111332 is an abundant number, since it is smaller than the sum of its proper divisors (1256417981980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231212111332 is a wasteful number, since it uses less digits than its factorization.

1231212111332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223128 (or 223126 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

Adding to 1231212111332 its reverse (2331112121321), we get a palindrome (3562324232653).

The spelling of 1231212111332 in words is "one trillion, two hundred thirty-one billion, two hundred twelve million, one hundred eleven thousand, three hundred thirty-two".