25011311245421 has 2 divisors, whose sum is σ = 25011311245422. Its totient is φ = 25011311245420.

The previous prime is 25011311245379. The next prime is 25011311245471. The reversal of 25011311245421 is 12454211311052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22464139933225 + 2547171312196 = 4739635^2 + 1595986^2 .

It is a cyclic number.

It is not a de Polignac number, because 25011311245421 - 2⁶ = 25011311245357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25011311245471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12505655622710 + 12505655622711.

It is an arithmetic number, because the mean of its divisors is an integer number (12505655622711).

Almost surely, 2^{25011311245421} is an apocalyptic number.

It is an amenable number.

25011311245421 is a deficient number, since it is larger than the sum of its proper divisors (1).

25011311245421 is an equidigital number, since it uses as much as digits as its factorization.

25011311245421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 32.

Adding to 25011311245421 its reverse (12454211311052), we get a palindrome (37465522556473).

The spelling of 25011311245421 in words is "twenty-five trillion, eleven billion, three hundred eleven million, two hundred forty-five thousand, four hundred twenty-one".