22212142 has 4 divisors (see below), whose sum is σ = 33318216. Its totient is φ = 11106070.

The previous prime is 22212133. The next prime is 22212187. The reversal of 22212142 is 24121222.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5553034 + ... + 5553037.

It is an arithmetic number, because the mean of its divisors is an integer number (8329554).

Almost surely, 2^22212142 is an apocalyptic number.

22212142 is a deficient number, since it is larger than the sum of its proper divisors (11106074).

22212142 is a wasteful number, since it uses less digits than its factorization.

22212142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11106073.

The product of its digits is 128, while the sum is 16.

The square root of 22212142 is about 4712.9759176130. The cubic root of 22212142 is about 281.1017053945.

Adding to 22212142 its reverse (24121222), we get a palindrome (46333364).

The spelling of 22212142 in words is "twenty-two million, two hundred twelve thousand, one hundred forty-two".