1222542025391 has 2 divisors, whose sum is σ = 1222542025392. Its totient is φ = 1222542025390.

The previous prime is 1222542025361. The next prime is 1222542025429. The reversal of 1222542025391 is 1935202452221.

It is an a-pointer prime, because the next prime (1222542025429) can be obtained adding 1222542025391 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222542025391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222542025361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611271012695 + 611271012696.

It is an arithmetic number, because the mean of its divisors is an integer number (611271012696).

Almost surely, 2^{1222542025391} is an apocalyptic number.

1222542025391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222542025391 is an equidigital number, since it uses as much as digits as its factorization.

1222542025391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 1222542025391 in words is "one trillion, two hundred twenty-two billion, five hundred forty-two million, twenty-five thousand, three hundred ninety-one".