121250067551 has 4 divisors (see below), whose sum is σ = 121264529400. Its totient is φ = 121235605704.

The previous prime is 121250067503. The next prime is 121250067563. The reversal of 121250067551 is 155760052121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155760052121 = 71 ⋅2193803551.

It is a cyclic number.

It is not a de Polignac number, because 121250067551 - 2³⁴ = 104070198367 is a prime.

It is a super-2 number, since 2×121250067551² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121250067581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7218341 + ... + 7235118.

It is an arithmetic number, because the mean of its divisors is an integer number (30316132350).

Almost surely, 2^121250067551 is an apocalyptic number.

121250067551 is a deficient number, since it is larger than the sum of its proper divisors (14461849).

121250067551 is an equidigital number, since it uses as much as digits as its factorization.

121250067551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14461848.

The product of its (nonzero) digits is 21000, while the sum is 35.

The spelling of 121250067551 in words is "one hundred twenty-one billion, two hundred fifty million, sixty-seven thousand, five hundred fifty-one".