1231422511100 has 36 divisors (see below), whose sum is σ = 2829374314704. Its totient is φ = 463594356480.

The previous prime is 1231422511091. The next prime is 1231422511103. The reversal of 1231422511100 is 11152241321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231422511103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 362181392 + ... + 362184791.

It is an arithmetic number, because the mean of its divisors is an integer number (78593730964).

Almost surely, 2^{1231422511100} is an apocalyptic number.

1231422511100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231422511100 is an abundant number, since it is smaller than the sum of its proper divisors (1597951803604).

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

1231422511100 is a wasteful number, since it uses less digits than its factorization.

1231422511100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724366214 (or 724366207 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 1231422511100 its reverse (11152241321), we get a palindrome (1242574752421).

The spelling of 1231422511100 in words is "one trillion, two hundred thirty-one billion, four hundred twenty-two million, five hundred eleven thousand, one hundred".