21142025254543 has 2 divisors, whose sum is σ = 21142025254544. Its totient is φ = 21142025254542.

The previous prime is 21142025254501. The next prime is 21142025254547. The reversal of 21142025254543 is 34545252024112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21142025254543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21142025254496 and 21142025254505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21142025254547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10571012627271 + 10571012627272.

It is an arithmetic number, because the mean of its divisors is an integer number (10571012627272).

Almost surely, 2^{21142025254543} is an apocalyptic number.

21142025254543 is a deficient number, since it is larger than the sum of its proper divisors (1).

21142025254543 is an equidigital number, since it uses as much as digits as its factorization.

21142025254543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384000, while the sum is 40.

Adding to 21142025254543 its reverse (34545252024112), we get a palindrome (55687277278655).

The spelling of 21142025254543 in words is "twenty-one trillion, one hundred forty-two billion, twenty-five million, two hundred fifty-four thousand, five hundred forty-three".