121222201021 has 8 divisors (see below), whose sum is σ = 121335921720. Its totient is φ = 121108534272.

The previous prime is 121222201007. The next prime is 121222201057. The reversal of 121222201021 is 120102222121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 68144492025 + 53077708996 = 261045^2 + 230386^2 .

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 121222201021 - 2⁵ = 121222200989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121222200986 and 121222201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222204021) 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, 5480841 + ... + 5502913.

It is an arithmetic number, because the mean of its divisors is an integer number (15166990215).

Almost surely, 2^121222201021 is an apocalyptic number.

It is an amenable number.

121222201021 is a deficient number, since it is larger than the sum of its proper divisors (113720699).

121222201021 is a wasteful number, since it uses less digits than its factorization.

121222201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26975.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121222201021 its reverse (120102222121), we get a palindrome (241324423142).

The spelling of 121222201021 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred one thousand, twenty-one".