121554033427 has 2 divisors, whose sum is σ = 121554033428. Its totient is φ = 121554033426.

The previous prime is 121554033407. The next prime is 121554033451. The reversal of 121554033427 is 724330455121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121554033427 is a prime.

It is not a weakly prime, because it can be changed into another prime (121554033407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60777016713 + 60777016714.

It is an arithmetic number, because the mean of its divisors is an integer number (60777016714).

Almost surely, 2^121554033427 is an apocalyptic number.

121554033427 is a deficient number, since it is larger than the sum of its proper divisors (1).

121554033427 is an equidigital number, since it uses as much as digits as its factorization.

121554033427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 37.

Adding to 121554033427 its reverse (724330455121), we get a palindrome (845884488548).

The spelling of 121554033427 in words is "one hundred twenty-one billion, five hundred fifty-four million, thirty-three thousand, four hundred twenty-seven".