1201143431 has 4 divisors (see below), whose sum is σ = 1242562200. Its totient is φ = 1159724664.

The previous prime is 1201143407. The next prime is 1201143451. The reversal of 1201143431 is 1343411021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1343411021 = 6379 ⋅210599.

It is a cyclic number.

It is not a de Polignac number, because 1201143431 - 2⁶ = 1201143367 is a prime.

It is a super-2 number, since 2×1201143431² = 2885491083668903522, 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 (1201143401) 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, 20709341 + ... + 20709398.

It is an arithmetic number, because the mean of its divisors is an integer number (310640550).

Almost surely, 2^1201143431 is an apocalyptic number.

1201143431 is a deficient number, since it is larger than the sum of its proper divisors (41418769).

1201143431 is an equidigital number, since it uses as much as digits as its factorization.

1201143431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41418768.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1201143431 is about 34657.5162266427. The cubic root of 1201143431 is about 1062.9959833555.

Adding to 1201143431 its reverse (1343411021), we get a palindrome (2544554452).

The spelling of 1201143431 in words is "one billion, two hundred one million, one hundred forty-three thousand, four hundred thirty-one".