121023871 has 2 divisors, whose sum is σ = 121023872. Its totient is φ = 121023870.

The previous prime is 121023827. The next prime is 121023911. The reversal of 121023871 is 178320121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121023871 - 2⁹ = 121023359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121023821) 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 as a sum of consecutive naturals, namely, 60511935 + 60511936.

It is an arithmetic number, because the mean of its divisors is an integer number (60511936).

Almost surely, 2^121023871 is an apocalyptic number.

121023871 is a deficient number, since it is larger than the sum of its proper divisors (1).

121023871 is an equidigital number, since it uses as much as digits as its factorization.

121023871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 121023871 is about 11001.0849919451. The cubic root of 121023871 is about 494.6412678207.

Adding to 121023871 its reverse (178320121), we get a palindrome (299343992).

The spelling of 121023871 in words is "one hundred twenty-one million, twenty-three thousand, eight hundred seventy-one".