40401221511 has 8 divisors (see below), whose sum is σ = 61563766144. Its totient is φ = 23086412280.

The previous prime is 40401221503. The next prime is 40401221521. The reversal of 40401221511 is 11512210404.

40401221511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40401221511 - 2³ = 40401221503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1923867691 = 40401221511 / (4 + 0 + 4 + 0 + 1 + 2 + 2 + 1 + 5 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40401221521) 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, 961933825 + ... + 961933866.

It is an arithmetic number, because the mean of its divisors is an integer number (7695470768).

Almost surely, 2^40401221511 is an apocalyptic number.

40401221511 is a deficient number, since it is larger than the sum of its proper divisors (21162544633).

40401221511 is a wasteful number, since it uses less digits than its factorization.

40401221511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923867701.

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 40401221511 its reverse (11512210404), we get a palindrome (51913431915).

The spelling of 40401221511 in words is "forty billion, four hundred one million, two hundred twenty-one thousand, five hundred eleven".