201112121987 has 16 divisors (see below), whose sum is σ = 235466626752. Its totient is φ = 168164321280.

The previous prime is 201112121983. The next prime is 201112121989. The reversal of 201112121987 is 789121211102.

It is a cyclic number.

It is not a de Polignac number, because 201112121987 - 2² = 201112121983 is a prime.

It is a super-2 number, since 2×201112121987² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201112121983) 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, 5980673 + ... + 6014205.

It is an arithmetic number, because the mean of its divisors is an integer number (14716664172).

Almost surely, 2^201112121987 is an apocalyptic number.

201112121987 is a deficient number, since it is larger than the sum of its proper divisors (34354504765).

201112121987 is a wasteful number, since it uses less digits than its factorization.

201112121987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54478.

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

The spelling of 201112121987 in words is "two hundred one billion, one hundred twelve million, one hundred twenty-one thousand, nine hundred eighty-seven".