2120501222440 has 64 divisors (see below), whose sum is σ = 4928093084160. Its totient is φ = 820329519360.

The previous prime is 2120501222407. The next prime is 2120501222447. The reversal of 2120501222440 is 442221050212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2120501222447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1470027 + ... + 2530213.

It is an arithmetic number, because the mean of its divisors is an integer number (77001454440).

Almost surely, 2^{2120501222440} is an apocalyptic number.

2120501222440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2120501222440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2464046542080).

2120501222440 is an abundant number, since it is smaller than the sum of its proper divisors (2807591861720).

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

2120501222440 is a wasteful number, since it uses less digits than its factorization.

2120501222440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061842 (or 1061838 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 2120501222440 its reverse (442221050212), we get a palindrome (2562722272652).

The spelling of 2120501222440 in words is "two trillion, one hundred twenty billion, five hundred one million, two hundred twenty-two thousand, four hundred forty".