121551112235533 has 2 divisors, whose sum is σ = 121551112235534. Its totient is φ = 121551112235532.

The previous prime is 121551112235429. The next prime is 121551112235561. The reversal of 121551112235533 is 335532211155121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101856093694884 + 19695018540649 = 10092378^2 + 4437907^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121551112235533 is a prime.

It is a super-3 number, since 3×121551112235533³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121551112235933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60775556117766 + 60775556117767.

It is an arithmetic number, because the mean of its divisors is an integer number (60775556117767).

Almost surely, 2^{121551112235533} is an apocalyptic number.

It is an amenable number.

121551112235533 is a deficient number, since it is larger than the sum of its proper divisors (1).

121551112235533 is an equidigital number, since it uses as much as digits as its factorization.

121551112235533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135000, while the sum is 40.

The spelling of 121551112235533 in words is "one hundred twenty-one trillion, five hundred fifty-one billion, one hundred twelve million, two hundred thirty-five thousand, five hundred thirty-three".