1122221987 has 2 divisors, whose sum is σ = 1122221988. Its totient is φ = 1122221986.

The previous prime is 1122221963. The next prime is 1122222007. The reversal of 1122221987 is 7891222211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1122221987 - 2⁶ = 1122221923 is a prime.

It is not a weakly prime, because it can be changed into another prime (1122221887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561110993 + 561110994.

It is an arithmetic number, because the mean of its divisors is an integer number (561110994).

Almost surely, 2^1122221987 is an apocalyptic number.

1122221987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122221987 is an equidigital number, since it uses as much as digits as its factorization.

1122221987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 35.

The square root of 1122221987 is about 33499.5818929132. The cubic root of 1122221987 is about 1039.1851318508.

The spelling of 1122221987 in words is "one billion, one hundred twenty-two million, two hundred twenty-one thousand, nine hundred eighty-seven".