16121236 has 24 divisors (see below), whose sum is σ = 29998080. Its totient is φ = 7554432.

The previous prime is 16121227. The next prime is 16121239. The reversal of 16121236 is 63212161.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16121239) 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, 25735 + ... + 26353.

It is an arithmetic number, because the mean of its divisors is an integer number (1249920).

Almost surely, 2^16121236 is an apocalyptic number.

It is an amenable number.

16121236 is a deficient number, since it is larger than the sum of its proper divisors (13876844).

16121236 is a wasteful number, since it uses less digits than its factorization.

16121236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023 (or 1021 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 16121236 is about 4015.1259008903. The cubic root of 16121236 is about 252.6190583189.

Adding to 16121236 its reverse (63212161), we get a palindrome (79333397).

The spelling of 16121236 in words is "sixteen million, one hundred twenty-one thousand, two hundred thirty-six".