121210322021 has 4 divisors (see below), whose sum is σ = 122282979852. Its totient is φ = 120137664192.

The previous prime is 121210322017. The next prime is 121210322063. The reversal of 121210322021 is 120223012121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32636229025 + 88574092996 = 180655^2 + 297614^2 .

It is a cyclic number.

It is not a de Polignac number, because 121210322021 - 2² = 121210322017 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 (121210322011) 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, 536328746 + ... + 536328971.

It is an arithmetic number, because the mean of its divisors is an integer number (30570744963).

Almost surely, 2^121210322021 is an apocalyptic number.

It is an amenable number.

121210322021 is a deficient number, since it is larger than the sum of its proper divisors (1072657831).

121210322021 is a wasteful number, since it uses less digits than its factorization.

121210322021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072657830.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 121210322021 its reverse (120223012121), we get a palindrome (241433334142).

The spelling of 121210322021 in words is "one hundred twenty-one billion, two hundred ten million, three hundred twenty-two thousand, twenty-one".