4021221011240 has 32 divisors (see below), whose sum is σ = 9093213360000. Its totient is φ = 1600405545024.

The previous prime is 4021221011153. The next prime is 4021221011267. The reversal of 4021221011240 is 421101221204.

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

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, 252581300 + ... + 252597219.

It is an arithmetic number, because the mean of its divisors is an integer number (284162917500).

Almost surely, 2^{4021221011240} is an apocalyptic number.

4021221011240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4021221011240 is an abundant number, since it is smaller than the sum of its proper divisors (5071992348760).

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

4021221011240 is a wasteful number, since it uses less digits than its factorization.

4021221011240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505178729 (or 505178725 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 4021221011240 its reverse (421101221204), we get a palindrome (4442322232444).

The spelling of 4021221011240 in words is "four trillion, twenty-one billion, two hundred twenty-one million, eleven thousand, two hundred forty".