121021221021 has 8 divisors (see below), whose sum is σ = 161391426720. Its totient is φ = 80665914672.

The previous prime is 121021221019. The next prime is 121021221187. The reversal of 121021221021 is 120122120121.

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

It is not a de Polignac number, because 121021221021 - 2¹ = 121021221019 is a prime.

It is a super-2 number, since 2×121021221021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021221421) 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 7 ways as a sum of consecutive naturals, for example, 3705870 + ... + 3738383.

It is an arithmetic number, because the mean of its divisors is an integer number (20173928340).

Almost surely, 2^121021221021 is an apocalyptic number.

It is an amenable number.

121021221021 is a deficient number, since it is larger than the sum of its proper divisors (40370205699).

121021221021 is an equidigital number, since it uses as much as digits as its factorization.

121021221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7449675.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121021221021 its reverse (120122120121), we get a palindrome (241143341142).

The spelling of 121021221021 in words is "one hundred twenty-one billion, twenty-one million, two hundred twenty-one thousand, twenty-one".