40421311220 has 24 divisors (see below), whose sum is σ = 85022356104. Its totient is φ = 16142314496.

The previous prime is 40421311201. The next prime is 40421311243. The reversal of 40421311220 is 2211312404.

It can be written as a sum of positive squares in 4 ways, for example, as 1817104 + 40419494116 = 1348^2 + 201046^2 .

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 = 40421311192 and 40421311201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1625477 + ... + 1650156.

It is an arithmetic number, because the mean of its divisors is an integer number (3542598171).

Almost surely, 2^40421311220 is an apocalyptic number.

It is an amenable number.

40421311220 is an abundant number, since it is smaller than the sum of its proper divisors (44601044884).

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

40421311220 is a wasteful number, since it uses less digits than its factorization.

40421311220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3276259 (or 3276257 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 40421311220 its reverse (2211312404), we get a palindrome (42632623624).

The spelling of 40421311220 in words is "forty billion, four hundred twenty-one million, three hundred eleven thousand, two hundred twenty".