121222222200021 has 8 divisors (see below), whose sum is σ = 162204824012544. Its totient is φ = 80527217593760.

The previous prime is 121222222200011. The next prime is 121222222200061. The reversal of 121222222200021 is 120002222222121.

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 121222222200021 - 2⁶ = 121222222199957 is a prime.

It is a super-2 number, since 2×121222222200021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222222200011) 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, 71899300581 + ... + 71899302266.

It is an arithmetic number, because the mean of its divisors is an integer number (20275603001568).

Almost surely, 2^{121222222200021} is an apocalyptic number.

It is an amenable number.

121222222200021 is a deficient number, since it is larger than the sum of its proper divisors (40982601812523).

121222222200021 is a wasteful number, since it uses less digits than its factorization.

121222222200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143798603131.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 121222222200021 its reverse (120002222222121), we get a palindrome (241224444422142).

The spelling of 121222222200021 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred thousand, twenty-one".