1021135012540 has 12 divisors (see below), whose sum is σ = 2144383526376. Its totient is φ = 408454005008.

The previous prime is 1021135012517. The next prime is 1021135012543. The reversal of 1021135012540 is 452105311201.

1021135012540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021135012543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25528375294 + ... + 25528375333.

It is an arithmetic number, because the mean of its divisors is an integer number (178698627198).

Almost surely, 2^{1021135012540} is an apocalyptic number.

1021135012540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021135012540 is an abundant number, since it is smaller than the sum of its proper divisors (1123248513836).

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

1021135012540 is a wasteful number, since it uses less digits than its factorization.

1021135012540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51056750636 (or 51056750634 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 1021135012540 in words is "one trillion, twenty-one billion, one hundred thirty-five million, twelve thousand, five hundred forty".