101221102987 has 6 divisors (see below), whose sum is σ = 106828920708. Its totient is φ = 95893676172.

The previous prime is 101221102981. The next prime is 101221102991. The reversal of 101221102987 is 789201122101.

It is not a de Polignac number, because 101221102987 - 2⁷ = 101221102859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101221102981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 140195073 + ... + 140195794.

It is an arithmetic number, because the mean of its divisors is an integer number (17804820118).

Almost surely, 2^101221102987 is an apocalyptic number.

101221102987 is a deficient number, since it is larger than the sum of its proper divisors (5607817721).

101221102987 is an equidigital number, since it uses as much as digits as its factorization.

101221102987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280390905 (or 280390886 counting only the distinct ones).

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

The spelling of 101221102987 in words is "one hundred one billion, two hundred twenty-one million, one hundred two thousand, nine hundred eighty-seven".