201002022121221 has 10 divisors (see below), whose sum is σ = 300262279958982. Its totient is φ = 134001348080760.

The previous prime is 201002022121213. The next prime is 201002022121237. The reversal of 201002022121221 is 122121220200102.

It is a happy number.

201002022121221 is a `hidden beast` number, since 20 + 10 + 0 + 202 + 212 + 1 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 180982536350625 + 20019485770596 = 13452975^2 + 4474314^2 .

It is not a de Polignac number, because 201002022121221 - 2³ = 201002022121213 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201002022121194 and 201002022121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201002022121721) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1240753222890 + ... + 1240753223051.

Almost surely, 2^{201002022121221} is an apocalyptic number.

It is an amenable number.

201002022121221 is a deficient number, since it is larger than the sum of its proper divisors (99260257837761).

201002022121221 is an equidigital number, since it uses as much as digits as its factorization.

201002022121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481506445953 (or 2481506445944 counting only the distinct ones).

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

Adding to 201002022121221 its reverse (122121220200102), we get a palindrome (323123242321323).

The spelling of 201002022121221 in words is "two hundred one trillion, two billion, twenty-two million, one hundred twenty-one thousand, two hundred twenty-one".