121222200021021 has 12 divisors (see below), whose sum is σ = 191016800033280. Its totient is φ = 73468000012680.

The previous prime is 121222200021007. The next prime is 121222200021071. The reversal of 121222200021021 is 120120002222121.

It is a happy number.

121222200021021 is a `hidden beast` number, since 1 + 212 + 2 + 220 + 0 + 0 + 210 + 21 = 666.

It is not a de Polignac number, because 121222200021021 - 2¹³ = 121222200012829 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121222200020985 and 121222200021003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222200021071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 612233333341 + ... + 612233333538.

It is an arithmetic number, because the mean of its divisors is an integer number (15918066669440).

Almost surely, 2^{121222200021021} is an apocalyptic number.

121222200021021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121222200021021 is a deficient number, since it is larger than the sum of its proper divisors (69794600012259).

121222200021021 is a wasteful number, since it uses less digits than its factorization.

121222200021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224466666896 (or 1224466666893 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121222200021021 its reverse (120120002222121), we get a palindrome (241342202243142).

The spelling of 121222200021021 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, two hundred million, twenty-one thousand, twenty-one".