1121020135525 has 12 divisors (see below), whose sum is σ = 1423968992964. Its totient is φ = 874942544000.

The previous prime is 1121020135517. The next prime is 1121020135541. The reversal of 1121020135525 is 5255310201211.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 287233827364 + 833786308161 = 535942^2 + 913119^2 .

It is not a de Polignac number, because 1121020135525 - 2³ = 1121020135517 is a prime.

It is a super-2 number, since 2×1121020135525² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121020135493 and 1121020135502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 546838066 + ... + 546840115.

It is an arithmetic number, because the mean of its divisors is an integer number (118664082747).

Almost surely, 2^{1121020135525} is an apocalyptic number.

It is an amenable number.

1121020135525 is a deficient number, since it is larger than the sum of its proper divisors (302948857439).

1121020135525 is a wasteful number, since it uses less digits than its factorization.

1121020135525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093678232 (or 1093678227 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 1121020135525 its reverse (5255310201211), we get a palindrome (6376330336736).

The spelling of 1121020135525 in words is "one trillion, one hundred twenty-one billion, twenty million, one hundred thirty-five thousand, five hundred twenty-five".