1201100431 has 4 divisors (see below), whose sum is σ = 1220790664. Its totient is φ = 1181410200.

The previous prime is 1201100423. The next prime is 1201100441. The reversal of 1201100431 is 1340011021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201100431 - 2³ = 1201100423 is a prime.

It is a super-2 number, since 2×1201100431² = 2885284490696771522, which 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 (1201100441) 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, 9845025 + ... + 9845146.

It is an arithmetic number, because the mean of its divisors is an integer number (305197666).

Almost surely, 2^1201100431 is an apocalyptic number.

1201100431 is a deficient number, since it is larger than the sum of its proper divisors (19690233).

1201100431 is an equidigital number, since it uses as much as digits as its factorization.

1201100431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19690232.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1201100431 is about 34656.8958650367. The cubic root of 1201100431 is about 1062.9832983945.

Adding to 1201100431 its reverse (1340011021), we get a palindrome (2541111452).

The spelling of 1201100431 in words is "one billion, two hundred one million, one hundred thousand, four hundred thirty-one".