121002201987 has 8 divisors (see below), whose sum is σ = 161379572736. Its totient is φ = 80646482952.

The previous prime is 121002201977. The next prime is 121002201989. The reversal of 121002201987 is 789102200121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121002201987 - 2⁸ = 121002201731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121002201989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5399883 + ... + 5422244.

It is an arithmetic number, because the mean of its divisors is an integer number (20172446592).

Almost surely, 2^121002201987 is an apocalyptic number.

121002201987 is a deficient number, since it is larger than the sum of its proper divisors (40377370749).

121002201987 is a wasteful number, since it uses less digits than its factorization.

121002201987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10825857.

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

The spelling of 121002201987 in words is "one hundred twenty-one billion, two million, two hundred one thousand, nine hundred eighty-seven".