121525140427 has 2 divisors, whose sum is σ = 121525140428. Its totient is φ = 121525140426.

The previous prime is 121525140409. The next prime is 121525140461. The reversal of 121525140427 is 724041525121.

It is an a-pointer prime, because the next prime (121525140461) can be obtained adding 121525140427 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121525140427 - 2²³ = 121516751819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121525140392 and 121525140401.

It is not a weakly prime, because it can be changed into another prime (121525140727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60762570213 + 60762570214.

It is an arithmetic number, because the mean of its divisors is an integer number (60762570214).

Almost surely, 2^121525140427 is an apocalyptic number.

121525140427 is a deficient number, since it is larger than the sum of its proper divisors (1).

121525140427 is an equidigital number, since it uses as much as digits as its factorization.

121525140427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22400, while the sum is 34.

Adding to 121525140427 its reverse (724041525121), we get a palindrome (845566665548).

The spelling of 121525140427 in words is "one hundred twenty-one billion, five hundred twenty-five million, one hundred forty thousand, four hundred twenty-seven".