22012123012 has 36 divisors (see below), whose sum is σ = 42760818828. Its totient is φ = 9906424000.

The previous prime is 22012122943. The next prime is 22012123013. The reversal of 22012123012 is 21032121022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19161203776 + 2850919236 = 138424^2 + 53394^2 .

It is not an unprimeable number, because it can be changed into a prime (22012123013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 176263 + ... + 274030.

It is an arithmetic number, because the mean of its divisors is an integer number (1187800523).

Almost surely, 2^22012123012 is an apocalyptic number.

22012123012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22012123012 is a deficient number, since it is larger than the sum of its proper divisors (20748695816).

22012123012 is a wasteful number, since it uses less digits than its factorization.

22012123012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450420 (or 450407 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 22012123012 its reverse (21032121022), we get a palindrome (43044244034).

The spelling of 22012123012 in words is "twenty-two billion, twelve million, one hundred twenty-three thousand, twelve".