121222231021 has 8 divisors (see below), whose sum is σ = 124253882424. Its totient is φ = 118194151680.

The previous prime is 121222231001. The next prime is 121222231051. The reversal of 121222231021 is 120132222121.

It can be written as a sum of positive squares in 4 ways, for example, as 8721692100 + 112500538921 = 93390^2 + 335411^2 .

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 121222231021 - 2²³ = 121213842413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121222231021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222231001) 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, 824230 + ... + 960103.

It is an arithmetic number, because the mean of its divisors is an integer number (15531735303).

Almost surely, 2^121222231021 is an apocalyptic number.

It is an amenable number.

121222231021 is a deficient number, since it is larger than the sum of its proper divisors (3031651403).

121222231021 is a wasteful number, since it uses less digits than its factorization.

121222231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786031.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 121222231021 its reverse (120132222121), we get a palindrome (241354453142).

The spelling of 121222231021 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred thirty-one thousand, twenty-one".