22121434 has 16 divisors (see below), whose sum is σ = 35172000. Its totient is φ = 10405584.

The previous prime is 22121431. The next prime is 22121447. The reversal of 22121434 is 43412122.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (22121431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3709 + ... + 7615.

It is an arithmetic number, because the mean of its divisors is an integer number (2198250).

Almost surely, 2^22121434 is an apocalyptic number.

22121434 is a deficient number, since it is larger than the sum of its proper divisors (13050566).

22121434 is a wasteful number, since it uses less digits than its factorization.

22121434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4077.

The product of its digits is 384, while the sum is 19.

The square root of 22121434 is about 4703.3428537584. The cubic root of 22121434 is about 280.7185371627.

Adding to 22121434 its reverse (43412122), we get a palindrome (65533556).

The spelling of 22121434 in words is "twenty-two million, one hundred twenty-one thousand, four hundred thirty-four".