22051012 has 12 divisors (see below), whose sum is σ = 39222316. Its totient is φ = 10844640.

The previous prime is 22051009. The next prime is 22051019. The reversal of 22051012 is 21015022.

It can be written as a sum of positive squares in 2 ways, for example, as 298116 + 21752896 = 546^2 + 4664^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22050983 and 22051001.

It is not an unprimeable number, because it can be changed into a prime (22051019) 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, 44943 + ... + 45430.

Almost surely, 2^22051012 is an apocalyptic number.

It is an amenable number.

22051012 is a deficient number, since it is larger than the sum of its proper divisors (17171304).

22051012 is a wasteful number, since it uses less digits than its factorization.

22051012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90438 (or 90436 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 22051012 is about 4695.8505086938. The cubic root of 22051012 is about 280.4203380574.

Adding to 22051012 its reverse (21015022), we get a palindrome (43066034).

The spelling of 22051012 in words is "twenty-two million, fifty-one thousand, twelve".