1190121831 has 6 divisors (see below), whose sum is σ = 1719064880. Its totient is φ = 793414548.

The previous prime is 1190121817. The next prime is 1190121853. The reversal of 1190121831 is 1381210911.

It is not a de Polignac number, because 1190121831 - 2⁵ = 1190121799 is a prime.

It is a super-2 number, since 2×1190121831² = 2832779945245585122, 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 = 1190121795 and 1190121804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1190120831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66117871 + ... + 66117888.

Almost surely, 2^1190121831 is an apocalyptic number.

1190121831 is a deficient number, since it is larger than the sum of its proper divisors (528943049).

1190121831 is a wasteful number, since it uses less digits than its factorization.

1190121831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132235765 (or 132235762 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

The square root of 1190121831 is about 34498.1424282526. The cubic root of 1190121831 is about 1059.7346645121.

The spelling of 1190121831 in words is "one billion, one hundred ninety million, one hundred twenty-one thousand, eight hundred thirty-one".