1025313453021 has 72 divisors (see below), whose sum is σ = 1654728778080. Its totient is φ = 563877874560.

The previous prime is 1025313453007. The next prime is 1025313453023. The reversal of 1025313453021 is 1203543135201.

It is not a de Polignac number, because 1025313453021 - 2⁷ = 1025313452893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1025313453021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025313453023) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3477835 + ... + 3761111.

It is an arithmetic number, because the mean of its divisors is an integer number (22982344140).

Almost surely, 2^{1025313453021} is an apocalyptic number.

1025313453021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1025313453021 is a deficient number, since it is larger than the sum of its proper divisors (629415325059).

1025313453021 is a wasteful number, since it uses less digits than its factorization.

1025313453021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283387 (or 283363 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 1025313453021 its reverse (1203543135201), we get a palindrome (2228856588222).

The spelling of 1025313453021 in words is "one trillion, twenty-five billion, three hundred thirteen million, four hundred fifty-three thousand, twenty-one".