121139211 has 4 divisors (see below), whose sum is σ = 161518952. Its totient is φ = 80759472.

The previous prime is 121139201. The next prime is 121139233. The reversal of 121139211 is 112931121.

It is a happy number.

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

It is not a de Polignac number, because 121139211 - 2¹³ = 121131019 is a prime.

It is a super-3 number, since 3×121139211³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121139201) 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, 20189866 + ... + 20189871.

It is an arithmetic number, because the mean of its divisors is an integer number (40379738).

Almost surely, 2^121139211 is an apocalyptic number.

121139211 is a deficient number, since it is larger than the sum of its proper divisors (40379741).

121139211 is an equidigital number, since it uses as much as digits as its factorization.

121139211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40379740.

The product of its digits is 108, while the sum is 21.

The square root of 121139211 is about 11006.3259537413. The cubic root of 121139211 is about 494.7983547623.

The spelling of 121139211 in words is "one hundred twenty-one million, one hundred thirty-nine thousand, two hundred eleven".