216703121 has 8 divisors (see below), whose sum is σ = 218444064. Its totient is φ = 214967520.

The previous prime is 216703073. The next prime is 216703127. The reversal of 216703121 is 121307612.

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 216703121 - 2⁶ = 216703057 is a prime.

It is a super-2 number, since 2×216703121² = 93920485302281282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216703127) 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, 123170 + ... + 124916.

It is an arithmetic number, because the mean of its divisors is an integer number (27305508).

Almost surely, 2^216703121 is an apocalyptic number.

It is an amenable number.

216703121 is a deficient number, since it is larger than the sum of its proper divisors (1740943).

216703121 is a wasteful number, since it uses less digits than its factorization.

216703121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2671.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 216703121 is about 14720.8396839311. The cubic root of 216703121 is about 600.6503328203.

The spelling of 216703121 in words is "two hundred sixteen million, seven hundred three thousand, one hundred twenty-one".