1021022099987 has 2 divisors, whose sum is σ = 1021022099988. Its totient is φ = 1021022099986.

The previous prime is 1021022099983. The next prime is 1021022100017. The reversal of 1021022099987 is 7899902201201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021022099987 - 2² = 1021022099983 is a prime.

It is a super-2 number, since 2×1021022099987² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1021022099983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510511049993 + 510511049994.

It is an arithmetic number, because the mean of its divisors is an integer number (510511049994).

Almost surely, 2^{1021022099987} is an apocalyptic number.

1021022099987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021022099987 is an equidigital number, since it uses as much as digits as its factorization.

1021022099987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 50.

The spelling of 1021022099987 in words is "one trillion, twenty-one billion, twenty-two million, ninety-nine thousand, nine hundred eighty-seven".