1231100100422 has 16 divisors (see below), whose sum is σ = 1977246035280. Its totient is φ = 572831770368.

The previous prime is 1231100100409. The next prime is 1231100100427. The reversal of 1231100100422 is 2240010011321.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 1231100100422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231100100427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203417348 + ... + 203423399.

It is an arithmetic number, because the mean of its divisors is an integer number (123577877205).

Almost surely, 2^{1231100100422} is an apocalyptic number.

1231100100422 is a deficient number, since it is larger than the sum of its proper divisors (746145934858).

1231100100422 is a wasteful number, since it uses less digits than its factorization.

1231100100422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406840855.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1231100100422 its reverse (2240010011321), we get a palindrome (3471110111743).

The spelling of 1231100100422 in words is "one trillion, two hundred thirty-one billion, one hundred million, one hundred thousand, four hundred twenty-two".