22001021012 has 12 divisors (see below), whose sum is σ = 39228235956. Its totient is φ = 10792953600.

The previous prime is 22001021011. The next prime is 22001021027. The reversal of 22001021012 is 21012010022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15726163216 + 6274857796 = 125404^2 + 79214^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22001020984 and 22001021002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001021011) 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, 51888989 + ... + 51889412.

It is an arithmetic number, because the mean of its divisors is an integer number (3269019663).

Almost surely, 2^22001021012 is an apocalyptic number.

It is an amenable number.

22001021012 is a deficient number, since it is larger than the sum of its proper divisors (17227214944).

22001021012 is a wasteful number, since it uses less digits than its factorization.

22001021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103778458 (or 103778456 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22001021012 its reverse (21012010022), we get a palindrome (43013031034).

The spelling of 22001021012 in words is "twenty-two billion, one million, twenty-one thousand, twelve".