121271801 has 16 divisors (see below), whose sum is σ = 145689600. Its totient is φ = 98694288.

The previous prime is 121271779. The next prime is 121271803. The reversal of 121271801 is 108172121.

It is a de Polignac number, because none of the positive numbers 2^k-121271801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (121271803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19670 + ... + 25088.

It is an arithmetic number, because the mean of its divisors is an integer number (9105600).

Almost surely, 2^121271801 is an apocalyptic number.

It is an amenable number.

121271801 is a deficient number, since it is larger than the sum of its proper divisors (24417799).

121271801 is a wasteful number, since it uses less digits than its factorization.

121271801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5588.

The product of its (nonzero) digits is 224, while the sum is 23.

The square root of 121271801 is about 11012.3476606943. The cubic root of 121271801 is about 494.9788121394.

The spelling of 121271801 in words is "one hundred twenty-one million, two hundred seventy-one thousand, eight hundred one".