1121023961 has 2 divisors, whose sum is σ = 1121023962. Its totient is φ = 1121023960.

The previous prime is 1121023957. The next prime is 1121023963. The reversal of 1121023961 is 1693201211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 883278400 + 237745561 = 29720^2 + 15419^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121023961 - 2² = 1121023957 is a prime.

It is a super-2 number, since 2×1121023961² = 2513389442272259042, which contains 22 as substring.

Together with 1121023963, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121023961.

It is not a weakly prime, because it can be changed into another prime (1121023963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560511980 + 560511981.

It is an arithmetic number, because the mean of its divisors is an integer number (560511981).

Almost surely, 2^1121023961 is an apocalyptic number.

It is an amenable number.

1121023961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121023961 is an equidigital number, since it uses as much as digits as its factorization.

1121023961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 1121023961 is about 33481.6959098550. The cubic root of 1121023961 is about 1038.8152067955.

The spelling of 1121023961 in words is "one billion, one hundred twenty-one million, twenty-three thousand, nine hundred sixty-one".