12122001987 has 8 divisors (see below), whose sum is σ = 16177327104. Its totient is φ = 8074005768.

The previous prime is 12122001979. The next prime is 12122002019. The reversal of 12122001987 is 78910022121.

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

It is not a de Polignac number, because 12122001987 - 2³ = 12122001979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12122001937) 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, 1828363 + ... + 1834980.

It is an arithmetic number, because the mean of its divisors is an integer number (2022165888).

Almost surely, 2^12122001987 is an apocalyptic number.

12122001987 is a deficient number, since it is larger than the sum of its proper divisors (4055325117).

12122001987 is a wasteful number, since it uses less digits than its factorization.

12122001987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3664449.

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

The spelling of 12122001987 in words is "twelve billion, one hundred twenty-two million, one thousand, nine hundred eighty-seven".