1121210977 has 2 divisors, whose sum is σ = 1121210978. Its totient is φ = 1121210976.

The previous prime is 1121210953. The next prime is 1121210983. The reversal of 1121210977 is 7790121211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 777071376 + 344139601 = 27876^2 + 18551^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121210977 - 2¹¹ = 1121208929 is a prime.

It is a super-2 number, since 2×1121210977² = 2514228109890589058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1121210917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560605488 + 560605489.

It is an arithmetic number, because the mean of its divisors is an integer number (560605489).

Almost surely, 2^1121210977 is an apocalyptic number.

It is an amenable number.

1121210977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121210977 is an equidigital number, since it uses as much as digits as its factorization.

1121210977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 31.

The square root of 1121210977 is about 33484.4886029337. The cubic root of 1121210977 is about 1038.8729707295.

The spelling of 1121210977 in words is "one billion, one hundred twenty-one million, two hundred ten thousand, nine hundred seventy-seven".