1025111122451 has 4 divisors (see below), whose sum is σ = 1103965824192. Its totient is φ = 946256420712.

The previous prime is 1025111122447. The next prime is 1025111122493. The reversal of 1025111122451 is 1542211115201.

1025111122451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1025111122451 - 2² = 1025111122447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1025111122451.

It is not an unprimeable number, because it can be changed into a prime (1025111122051) 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, 39427350851 + ... + 39427350876.

It is an arithmetic number, because the mean of its divisors is an integer number (275991456048).

Almost surely, 2^{1025111122451} is an apocalyptic number.

1025111122451 is a deficient number, since it is larger than the sum of its proper divisors (78854701741).

1025111122451 is an equidigital number, since it uses as much as digits as its factorization.

1025111122451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78854701740.

The product of its (nonzero) digits is 800, while the sum is 26.

Adding to 1025111122451 its reverse (1542211115201), we get a palindrome (2567322237652).

The spelling of 1025111122451 in words is "one trillion, twenty-five billion, one hundred eleven million, one hundred twenty-two thousand, four hundred fifty-one".