121001155127 has 4 divisors (see below), whose sum is σ = 121953920256. Its totient is φ = 120048390000.

The previous prime is 121001155123. The next prime is 121001155129. The reversal of 121001155127 is 721551100121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121001155127 - 2² = 121001155123 is a prime.

It is a super-2 number, since 2×121001155127² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121001155096 and 121001155105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001155123) 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, 476382374 + ... + 476382627.

It is an arithmetic number, because the mean of its divisors is an integer number (30488480064).

Almost surely, 2^121001155127 is an apocalyptic number.

121001155127 is a deficient number, since it is larger than the sum of its proper divisors (952765129).

121001155127 is an equidigital number, since it uses as much as digits as its factorization.

121001155127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952765128.

The product of its (nonzero) digits is 700, while the sum is 26.

Adding to 121001155127 its reverse (721551100121), we get a palindrome (842552255248).

The spelling of 121001155127 in words is "one hundred twenty-one billion, one million, one hundred fifty-five thousand, one hundred twenty-seven".