1231100101212 has 48 divisors (see below), whose sum is σ = 2972822700960. Its totient is φ = 396055889152.

The previous prime is 1231100101157. The next prime is 1231100101229. The reversal of 1231100101212 is 2121010011321.

It is a junction number, because it is equal to n+sod(n) for n = 1231100101191 and 1231100101200.

It is a congruent number.

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, 147898 + ... + 1576094.

It is an arithmetic number, because the mean of its divisors is an integer number (61933806270).

Almost surely, 2^{1231100101212} is an apocalyptic number.

1231100101212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231100101212 is an abundant number, since it is smaller than the sum of its proper divisors (1741722599748).

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

1231100101212 is a wasteful number, since it uses less digits than its factorization.

1231100101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430710 (or 1430708 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1231100101212 its reverse (2121010011321), we get a palindrome (3352110112533).

The spelling of 1231100101212 in words is "one trillion, two hundred thirty-one billion, one hundred million, one hundred one thousand, two hundred twelve".