22001012 has 24 divisors (see below), whose sum is σ = 44214240. Its totient is φ = 9473760.

The previous prime is 22000963. The next prime is 22001033. The reversal of 22001012 is 21010022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12323 + ... + 13994.

It is an arithmetic number, because the mean of its divisors is an integer number (1842260).

Almost surely, 2^22001012 is an apocalyptic number.

22001012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22001012 is an abundant number, since it is smaller than the sum of its proper divisors (22213228).

22001012 is a wasteful number, since it uses less digits than its factorization.

22001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26351 (or 26349 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 22001012 is about 4690.5236381453. The cubic root of 22001012 is about 280.2082294600.

Adding to 22001012 its reverse (21010022), we get a palindrome (43011034).

It can be divided in two parts, 220010 and 12, that added together give a palindrome (220022).

The spelling of 22001012 in words is "twenty-two million, one thousand, twelve".