1231011105400 has 24 divisors (see below), whose sum is σ = 2862100820520. Its totient is φ = 492404442080.

The previous prime is 1231011105391. The next prime is 1231011105421. The reversal of 1231011105400 is 45011101321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3077527564 + ... + 3077527963.

It is an arithmetic number, because the mean of its divisors is an integer number (119254200855).

Almost surely, 2^{1231011105400} is an apocalyptic number.

1231011105400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231011105400 is an abundant number, since it is smaller than the sum of its proper divisors (1631089715120).

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

1231011105400 is a wasteful number, since it uses less digits than its factorization.

1231011105400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6155055543 (or 6155055534 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 1231011105400 its reverse (45011101321), we get a palindrome (1276022206721).

The spelling of 1231011105400 in words is "one trillion, two hundred thirty-one billion, eleven million, one hundred five thousand, four hundred".