22121011004 has 24 divisors (see below), whose sum is σ = 39391413600. Its totient is φ = 10867474944.

The previous prime is 22121010943. The next prime is 22121011009. The reversal of 22121011004 is 40011012122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 22121011004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121011009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67229 + ... + 220820.

It is an arithmetic number, because the mean of its divisors is an integer number (1641308900).

Almost surely, 2^22121011004 is an apocalyptic number.

It is an amenable number.

22121011004 is a deficient number, since it is larger than the sum of its proper divisors (17270402596).

22121011004 is a wasteful number, since it uses less digits than its factorization.

22121011004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288389 (or 288387 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22121011004 its reverse (40011012122), we get a palindrome (62132023126).

The spelling of 22121011004 in words is "twenty-two billion, one hundred twenty-one million, eleven thousand, four".