121331021021 has 8 divisors (see below), whose sum is σ = 138666888384. Its totient is φ = 103995869760.

The previous prime is 121331021017. The next prime is 121331021027. The reversal of 121331021021 is 120120133121.

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

It is a cyclic number.

It is not a de Polignac number, because 121331021021 - 2² = 121331021017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121331021027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253826 + ... + 554156.

It is an arithmetic number, because the mean of its divisors is an integer number (17333361048).

Almost surely, 2^121331021021 is an apocalyptic number.

It is an amenable number.

121331021021 is a deficient number, since it is larger than the sum of its proper divisors (17335867363).

121331021021 is an equidigital number, since it uses as much as digits as its factorization.

121331021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358051.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121331021021 its reverse (120120133121), we get a palindrome (241451154142).

The spelling of 121331021021 in words is "one hundred twenty-one billion, three hundred thirty-one million, twenty-one thousand, twenty-one".