1201122631 has 8 divisors (see below), whose sum is σ = 1218833280. Its totient is φ = 1183489272.

The previous prime is 1201122613. The next prime is 1201122679. The reversal of 1201122631 is 1362211021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1201122631 - 2¹⁵ = 1201089863 is a prime.

It is a super-2 number, since 2×1201122631² = 2885391149400724322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201122599 and 1201122608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201122331) 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, 12366 + ... + 50548.

It is an arithmetic number, because the mean of its divisors is an integer number (152354160).

Almost surely, 2^1201122631 is an apocalyptic number.

1201122631 is a deficient number, since it is larger than the sum of its proper divisors (17710649).

1201122631 is an equidigital number, since it uses as much as digits as its factorization.

1201122631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38645.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1201122631 is about 34657.2161461361. The cubic root of 1201122631 is about 1062.9898474121.

Adding to 1201122631 its reverse (1362211021), we get a palindrome (2563333652).

It can be divided in two parts, 120 and 1122631, that added together give a triangular number (1122751 = T₁₄₉₈).

The spelling of 1201122631 in words is "one billion, two hundred one million, one hundred twenty-two thousand, six hundred thirty-one".