1022120987 has 2 divisors, whose sum is σ = 1022120988. Its totient is φ = 1022120986.

The previous prime is 1022120947. The next prime is 1022121011. The reversal of 1022120987 is 7890212201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1022120987 - 2⁶ = 1022120923 is a prime.

It is not a weakly prime, because it can be changed into another prime (1022120917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511060493 + 511060494.

It is an arithmetic number, because the mean of its divisors is an integer number (511060494).

Almost surely, 2^1022120987 is an apocalyptic number.

1022120987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022120987 is an equidigital number, since it uses as much as digits as its factorization.

1022120987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 1022120987 is about 31970.6269409907. The cubic root of 1022120987 is about 1007.3199499280.

The spelling of 1022120987 in words is "one billion, twenty-two million, one hundred twenty thousand, nine hundred eighty-seven".