121012129187 has 8 divisors (see below), whose sum is σ = 121691289600. Its totient is φ = 120333444040.

The previous prime is 121012129171. The next prime is 121012129207. The reversal of 121012129187 is 781921210121.

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

It is a cyclic number.

It is not a de Polignac number, because 121012129187 - 2⁴ = 121012129171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121012129157) 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, 398138 + ... + 632880.

It is an arithmetic number, because the mean of its divisors is an integer number (15211411200).

Almost surely, 2^121012129187 is an apocalyptic number.

121012129187 is a deficient number, since it is larger than the sum of its proper divisors (679160413).

121012129187 is a wasteful number, since it uses less digits than its factorization.

121012129187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237633.

The product of its (nonzero) digits is 4032, while the sum is 35.

The spelling of 121012129187 in words is "one hundred twenty-one billion, twelve million, one hundred twenty-nine thousand, one hundred eighty-seven".