101210009987 has 2 divisors, whose sum is σ = 101210009988. Its totient is φ = 101210009986.

The previous prime is 101210009969. The next prime is 101210010019. The reversal of 101210009987 is 789900012101.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101210009987 is a prime.

It is a super-2 number, since 2×101210009987² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 101210009987.

It is not a weakly prime, because it can be changed into another prime (101210008987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50605004993 + 50605004994.

It is an arithmetic number, because the mean of its divisors is an integer number (50605004994).

Almost surely, 2^101210009987 is an apocalyptic number.

101210009987 is a deficient number, since it is larger than the sum of its proper divisors (1).

101210009987 is an equidigital number, since it uses as much as digits as its factorization.

101210009987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 38.

The spelling of 101210009987 in words is "one hundred one billion, two hundred ten million, nine thousand, nine hundred eighty-seven".