22001023012 has 6 divisors (see below), whose sum is σ = 38501790278. Its totient is φ = 11000511504.

The previous prime is 22001023003. The next prime is 22001023019. The reversal of 22001023012 is 21032010022.

It can be written as a sum of positive squares in only one way, i.e., 19495419876 + 2505603136 = 139626^2 + 50056^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22001022983 and 22001023001.

It is not an unprimeable number, because it can be changed into a prime (22001023019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2750127873 + ... + 2750127880.

Almost surely, 2^22001023012 is an apocalyptic number.

It is an amenable number.

22001023012 is a deficient number, since it is larger than the sum of its proper divisors (16500767266).

22001023012 is a wasteful number, since it uses less digits than its factorization.

22001023012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500255757 (or 5500255755 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 22001023012 its reverse (21032010022), we get a palindrome (43033033034).

The spelling of 22001023012 in words is "twenty-two billion, one million, twenty-three thousand, twelve".