1121422987 has 2 divisors, whose sum is σ = 1121422988. Its totient is φ = 1121422986.

The previous prime is 1121422979. The next prime is 1121422993. The reversal of 1121422987 is 7892241211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1121422987 - 2³ = 1121422979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121422927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560711493 + 560711494.

It is an arithmetic number, because the mean of its divisors is an integer number (560711494).

Almost surely, 2^1121422987 is an apocalyptic number.

1121422987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121422987 is an equidigital number, since it uses as much as digits as its factorization.

1121422987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 37.

The square root of 1121422987 is about 33487.6542474984. The cubic root of 1121422987 is about 1038.9384468329.

The spelling of 1121422987 in words is "one billion, one hundred twenty-one million, four hundred twenty-two thousand, nine hundred eighty-seven".