216121126 has 8 divisors (see below), whose sum is σ = 349118784. Its totient is φ = 99748200.

The previous prime is 216121123. The next prime is 216121159. The reversal of 216121126 is 621121612.

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

It is a super-2 number, since 2×216121126² = 93416682207015752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216121097 and 216121106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216121123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4156150 + ... + 4156201.

It is an arithmetic number, because the mean of its divisors is an integer number (43639848).

Almost surely, 2^216121126 is an apocalyptic number.

216121126 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

216121126 is a deficient number, since it is larger than the sum of its proper divisors (132997658).

216121126 is a wasteful number, since it uses less digits than its factorization.

216121126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8312366.

The product of its digits is 288, while the sum is 22.

The square root of 216121126 is about 14701.0586693612. The cubic root of 216121126 is about 600.1121327461.

Adding to 216121126 its reverse (621121612), we get a palindrome (837242738).

The spelling of 216121126 in words is "two hundred sixteen million, one hundred twenty-one thousand, one hundred twenty-six".