121271771 has 4 divisors (see below), whose sum is σ = 121294992. Its totient is φ = 121248552.

The previous prime is 121271749. The next prime is 121271779. The reversal of 121271771 is 177172121.

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 121271771 - 2¹⁸ = 121009627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121271779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290 + ... + 15576.

It is an arithmetic number, because the mean of its divisors is an integer number (30323748).

Almost surely, 2^121271771 is an apocalyptic number.

121271771 is a deficient number, since it is larger than the sum of its proper divisors (23221).

121271771 is an equidigital number, since it uses as much as digits as its factorization.

121271771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23220.

The product of its digits is 1372, while the sum is 29.

The square root of 121271771 is about 11012.3462985869. The cubic root of 121271771 is about 494.9787713237.

The spelling of 121271771 in words is "one hundred twenty-one million, two hundred seventy-one thousand, seven hundred seventy-one".