1201201031 has 4 divisors (see below), whose sum is σ = 1202755752. Its totient is φ = 1199646312.

The previous prime is 1201201021. The next prime is 1201201073. The reversal of 1201201031 is 1301021021.

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-1201201031 is a prime.

It is a super-2 number, since 2×1201201031² = 2885767833750925922, 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 (1201201021) 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, 776201 + ... + 777746.

It is an arithmetic number, because the mean of its divisors is an integer number (300688938).

Almost surely, 2^1201201031 is an apocalyptic number.

1201201031 is a deficient number, since it is larger than the sum of its proper divisors (1554721).

1201201031 is an equidigital number, since it uses as much as digits as its factorization.

1201201031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554720.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1201201031 is about 34658.3472052549. The cubic root of 1201201031 is about 1063.0129748288.

Adding to 1201201031 its reverse (1301021021), we get a palindrome (2502222052).

The spelling of 1201201031 in words is "one billion, two hundred one million, two hundred one thousand, thirty-one".