121201200987 has 16 divisors (see below), whose sum is σ = 171188785152. Its totient is φ = 76011720320.

The previous prime is 121201200947. The next prime is 121201201007. The reversal of 121201200987 is 789002102121.

It is a cyclic number.

It is not a de Polignac number, because 121201200987 - 2⁷ = 121201200859 is a prime.

It is a super-2 number, since 2×121201200987² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121201200947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455223 + ... + 670544.

It is an arithmetic number, because the mean of its divisors is an integer number (10699299072).

Almost surely, 2^121201200987 is an apocalyptic number.

121201200987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

121201200987 is a deficient number, since it is larger than the sum of its proper divisors (49987584165).

121201200987 is a wasteful number, since it uses less digits than its factorization.

121201200987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127898.

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

The spelling of 121201200987 in words is "one hundred twenty-one billion, two hundred one million, two hundred thousand, nine hundred eighty-seven".