121921119221 has 8 divisors (see below), whose sum is σ = 138787677504. Its totient is φ = 106018364320.

The previous prime is 121921119217. The next prime is 121921119223. The reversal of 121921119221 is 122911129121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121921119221 - 2² = 121921119217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121921119223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240950576 + ... + 240951081.

It is an arithmetic number, because the mean of its divisors is an integer number (17348459688).

Almost surely, 2^121921119221 is an apocalyptic number.

121921119221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121921119221 is a deficient number, since it is larger than the sum of its proper divisors (16866558283).

121921119221 is a wasteful number, since it uses less digits than its factorization.

121921119221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481901691.

The product of its digits is 1296, while the sum is 32.

It can be divided in two parts, 121921 and 119221, that added together give a palindrome (241142).

The spelling of 121921119221 in words is "one hundred twenty-one billion, nine hundred twenty-one million, one hundred nineteen thousand, two hundred twenty-one".