1021440122320 has 80 divisors (see below), whose sum is σ = 2461577234688. Its totient is φ = 393914442240.

The previous prime is 1021440122293. The next prime is 1021440122327. The reversal of 1021440122320 is 232210441201.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1021440122291 and 1021440122300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021440122327) 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, 1775391 + ... + 2279230.

Almost surely, 2^{1021440122320} is an apocalyptic number.

1021440122320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021440122320 is an abundant number, since it is smaller than the sum of its proper divisors (1440137112368).

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

1021440122320 is a wasteful number, since it uses less digits than its factorization.

1021440122320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054748 (or 4054742 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 1021440122320 its reverse (232210441201), we get a palindrome (1253650563521).

The spelling of 1021440122320 in words is "one trillion, twenty-one billion, four hundred forty million, one hundred twenty-two thousand, three hundred twenty".