1022120125540 has 12 divisors (see below), whose sum is σ = 2146452263676. Its totient is φ = 408848050208.

The previous prime is 1022120125531. The next prime is 1022120125567. The reversal of 1022120125540 is 455210212201.

It can be written as a sum of positive squares in 2 ways, for example, as 663960966244 + 358159159296 = 814838^2 + 598464^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25553003119 + ... + 25553003158.

It is an arithmetic number, because the mean of its divisors is an integer number (178871021973).

Almost surely, 2^{1022120125540} is an apocalyptic number.

1022120125540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022120125540 is an abundant number, since it is smaller than the sum of its proper divisors (1124332138136).

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

1022120125540 is a wasteful number, since it uses less digits than its factorization.

1022120125540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51106006286 (or 51106006284 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 1022120125540 its reverse (455210212201), we get a palindrome (1477330337741).

The spelling of 1022120125540 in words is "one trillion, twenty-two billion, one hundred twenty million, one hundred twenty-five thousand, five hundred forty".