2120522521440 has 96 divisors (see below), whose sum is σ = 6679856090880. Its totient is φ = 565454882304.

The previous prime is 2120522521433. The next prime is 2120522521457. The reversal of 2120522521440 is 441252250212.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2120522521398 and 2120522521407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23574471 + ... + 23664249.

It is an arithmetic number, because the mean of its divisors is an integer number (69581834280).

Almost surely, 2^{2120522521440} is an apocalyptic number.

2120522521440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120522521440 is an abundant number, since it is smaller than the sum of its proper divisors (4559333569440).

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

2120522521440 is a wasteful number, since it uses less digits than its factorization.

2120522521440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139004 (or 138996 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 2120522521440 its reverse (441252250212), we get a palindrome (2561774771652).

The spelling of 2120522521440 in words is "two trillion, one hundred twenty billion, five hundred twenty-two million, five hundred twenty-one thousand, four hundred forty".