101210221987 has 16 divisors (see below), whose sum is σ = 117581363200. Its totient is φ = 85317611040.

The previous prime is 101210221933. The next prime is 101210221993. The reversal of 101210221987 is 789122012101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101210221987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101210221487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4531714 + ... + 4553992.

It is an arithmetic number, because the mean of its divisors is an integer number (7348835200).

Almost surely, 2^101210221987 is an apocalyptic number.

101210221987 is a deficient number, since it is larger than the sum of its proper divisors (16371141213).

101210221987 is a wasteful number, since it uses less digits than its factorization.

101210221987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32986.

The product of its (nonzero) digits is 4032, while the sum is 34.

The spelling of 101210221987 in words is "one hundred one billion, two hundred ten million, two hundred twenty-one thousand, nine hundred eighty-seven".