220121400040 has 64 divisors (see below), whose sum is σ = 497835072000. Its totient is φ = 87593655552.

The previous prime is 220121400007. The next prime is 220121400091. The reversal of 220121400040 is 40004121022.

220121400040 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 220121399987 and 220121400023.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14380311 + ... + 14395609.

It is an arithmetic number, because the mean of its divisors is an integer number (7778673000).

Almost surely, 2^220121400040 is an apocalyptic number.

220121400040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220121400040 is an abundant number, since it is smaller than the sum of its proper divisors (277713671960).

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

220121400040 is a wasteful number, since it uses less digits than its factorization.

220121400040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17146 (or 17142 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 220121400040 its reverse (40004121022), we get a palindrome (260125521062).

The spelling of 220121400040 in words is "two hundred twenty billion, one hundred twenty-one million, four hundred thousand, forty".