121122220331 has 4 divisors (see below), whose sum is σ = 138425394672. Its totient is φ = 103819045992.

The previous prime is 121122220327. The next prime is 121122220333. The reversal of 121122220331 is 133022221121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133022221121 = 31 ⋅4291039391.

It is a cyclic number.

It is not a de Polignac number, because 121122220331 - 2² = 121122220327 is a prime.

It is a super-2 number, since 2×121122220331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121122220333) 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 in 3 ways as a sum of consecutive naturals, for example, 8651587160 + ... + 8651587173.

It is an arithmetic number, because the mean of its divisors is an integer number (34606348668).

Almost surely, 2^121122220331 is an apocalyptic number.

121122220331 is a deficient number, since it is larger than the sum of its proper divisors (17303174341).

121122220331 is an equidigital number, since it uses as much as digits as its factorization.

121122220331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17303174340.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 121122220331 its reverse (133022221121), we get a palindrome (254144441452).

The spelling of 121122220331 in words is "one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, three hundred thirty-one".