1025513550421 has 4 divisors (see below), whose sum is σ = 1047332987712. Its totient is φ = 1003694113132.

The previous prime is 1025513550389. The next prime is 1025513550427. The reversal of 1025513550421 is 1240553155201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1025513550421 - 2⁵ = 1025513550389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025513550427) 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, 10909718575 + ... + 10909718668.

It is an arithmetic number, because the mean of its divisors is an integer number (261833246928).

Almost surely, 2^{1025513550421} is an apocalyptic number.

It is an amenable number.

1025513550421 is a deficient number, since it is larger than the sum of its proper divisors (21819437291).

1025513550421 is an equidigital number, since it uses as much as digits as its factorization.

1025513550421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21819437290.

The product of its (nonzero) digits is 30000, while the sum is 34.

The spelling of 1025513550421 in words is "one trillion, twenty-five billion, five hundred thirteen million, five hundred fifty thousand, four hundred twenty-one".