10202121199987 has 2 divisors, whose sum is σ = 10202121199988. Its totient is φ = 10202121199986.

The previous prime is 10202121199979. The next prime is 10202121200027. The reversal of 10202121199987 is 78999112120201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10202121199987 - 2³ = 10202121199979 is a prime.

It is not a weakly prime, because it can be changed into another prime (10202121199187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101060599993 + 5101060599994.

It is an arithmetic number, because the mean of its divisors is an integer number (5101060599994).

Almost surely, 2^{10202121199987} is an apocalyptic number.

10202121199987 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202121199987 is an equidigital number, since it uses as much as digits as its factorization.

10202121199987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 52.

The spelling of 10202121199987 in words is "ten trillion, two hundred two billion, one hundred twenty-one million, one hundred ninety-nine thousand, nine hundred eighty-seven".