22121440040 has 96 divisors (see below), whose sum is σ = 59767372800. Its totient is φ = 7339812480.

The previous prime is 22121440031. The next prime is 22121440069. The reversal of 22121440040 is 4004412122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22121439994 and 22121440021.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121280 + ... + 242799.

It is an arithmetic number, because the mean of its divisors is an integer number (622576800).

Almost surely, 2^22121440040 is an apocalyptic number.

22121440040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121440040 is an abundant number, since it is smaller than the sum of its proper divisors (37645932760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22121440040 is a wasteful number, since it uses less digits than its factorization.

22121440040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364135 (or 364124 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 22121440040 its reverse (4004412122), we get a palindrome (26125852162).

The spelling of 22121440040 in words is "twenty-two billion, one hundred twenty-one million, four hundred forty thousand, forty".