1211120997 has 16 divisors (see below), whose sum is σ = 1687063680. Its totient is φ = 771848000.

The previous prime is 1211120993. The next prime is 1211121013. The reversal of 1211120997 is 7990211121.

It is a cyclic number.

It is not a de Polignac number, because 1211120997 - 2² = 1211120993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211120993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60129 + ... + 77702.

It is an arithmetic number, because the mean of its divisors is an integer number (105441480).

Almost surely, 2^1211120997 is an apocalyptic number.

It is an amenable number.

1211120997 is a deficient number, since it is larger than the sum of its proper divisors (475942683).

1211120997 is a wasteful number, since it uses less digits than its factorization.

1211120997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137964.

The product of its (nonzero) digits is 2268, while the sum is 33.

The square root of 1211120997 is about 34801.1637305421. The cubic root of 1211120997 is about 1065.9312087253.

The spelling of 1211120997 in words is "one billion, two hundred eleven million, one hundred twenty thousand, nine hundred ninety-seven".