1001222100987 has 4 divisors (see below), whose sum is σ = 1334962801320. Its totient is φ = 667481400656.

The previous prime is 1001222100953. The next prime is 1001222101063. The reversal of 1001222100987 is 7890012221001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1001222100987 - 2²⁰ = 1001221052411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001222100947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166870350162 + ... + 166870350167.

It is an arithmetic number, because the mean of its divisors is an integer number (333740700330).

Almost surely, 2^{1001222100987} is an apocalyptic number.

1001222100987 is a deficient number, since it is larger than the sum of its proper divisors (333740700333).

1001222100987 is an equidigital number, since it uses as much as digits as its factorization.

1001222100987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333740700332.

The product of its (nonzero) digits is 4032, while the sum is 33.

Adding to 1001222100987 its reverse (7890012221001), we get a palindrome (8891234321988).

The spelling of 1001222100987 in words is "one trillion, one billion, two hundred twenty-two million, one hundred thousand, nine hundred eighty-seven".