40221040121220 has 384 divisors, whose sum is σ = 131706407669760. Its totient is φ = 8981512151040.

The previous prime is 40221040121209. The next prime is 40221040121263. The reversal of 40221040121220 is 2212104012204.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 10236964216 + ... + 10236968144.

It is an arithmetic number, because the mean of its divisors is an integer number (342985436640).

Almost surely, 2^{40221040121220} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40221040121220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65853203834880).

40221040121220 is an abundant number, since it is smaller than the sum of its proper divisors (91485367548540).

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

40221040121220 is a wasteful number, since it uses less digits than its factorization.

40221040121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6923 (or 6921 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 40221040121220 its reverse (2212104012204), we get a palindrome (42433144133424).

The spelling of 40221040121220 in words is "forty trillion, two hundred twenty-one billion, forty million, one hundred twenty-one thousand, two hundred twenty".