187012121 has 8 divisors (see below), whose sum is σ = 198132480. Its totient is φ = 175905088.

The previous prime is 187012109. The next prime is 187012127. The reversal of 187012121 is 121210781.

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 187012121 - 2¹⁴ = 186995737 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (187012127) 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, 51260 + ... + 54786.

It is an arithmetic number, because the mean of its divisors is an integer number (24766560).

Almost surely, 2^187012121 is an apocalyptic number.

It is an amenable number.

187012121 is a deficient number, since it is larger than the sum of its proper divisors (11120359).

187012121 is a wasteful number, since it uses less digits than its factorization.

187012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6663.

The product of its (nonzero) digits is 224, while the sum is 23.

The square root of 187012121 is about 13675.2375116486. The cubic root of 187012121 is about 571.8602616007.

The spelling of 187012121 in words is "one hundred eighty-seven million, twelve thousand, one hundred twenty-one".