1200100323431 has 4 divisors (see below), whose sum is σ = 1203558826152. Its totient is φ = 1196641820712.

The previous prime is 1200100323419. The next prime is 1200100323473. The reversal of 1200100323431 is 1343230010021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200100323431 is a prime.

It is a super-2 number, since 2×1200100323431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200100623431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1729250840 + ... + 1729251533.

It is an arithmetic number, because the mean of its divisors is an integer number (300889706538).

Almost surely, 2^{1200100323431} is an apocalyptic number.

1200100323431 is a deficient number, since it is larger than the sum of its proper divisors (3458502721).

1200100323431 is an equidigital number, since it uses as much as digits as its factorization.

1200100323431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3458502720.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1200100323431 its reverse (1343230010021), we get a palindrome (2543330333452).

The spelling of 1200100323431 in words is "one trillion, two hundred billion, one hundred million, three hundred twenty-three thousand, four hundred thirty-one".