1211121119977 has 12 divisors (see below), whose sum is σ = 1274132228740. Its totient is φ = 1151084851488.

The previous prime is 1211121119947. The next prime is 1211121119983. The reversal of 1211121119977 is 7799111211121.

It can be written as a sum of positive squares in 2 ways, for example, as 338795007721 + 872326112256 = 582061^2 + 933984^2 .

It is not a de Polignac number, because 1211121119977 - 2⁷ = 1211121119849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211121119947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7208202 + ... + 7374307.

Almost surely, 2^{1211121119977} is an apocalyptic number.

It is an amenable number.

1211121119977 is a deficient number, since it is larger than the sum of its proper divisors (63011108763).

1211121119977 is a wasteful number, since it uses less digits than its factorization.

1211121119977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14582712 (or 14582689 counting only the distinct ones).

The product of its digits is 15876, while the sum is 43.

The spelling of 1211121119977 in words is "one trillion, two hundred eleven billion, one hundred twenty-one million, one hundred nineteen thousand, nine hundred seventy-seven".