2121222021201 has 32 divisors (see below), whose sum is σ = 3327796120320. Its totient is φ = 1330807226112.

The previous prime is 2121222021199. The next prime is 2121222021209. The reversal of 2121222021201 is 1021202221212.

It is a happy number.

2121222021201 is a `hidden beast` number, since 21 + 212 + 220 + 212 + 0 + 1 = 666.

It is not a de Polignac number, because 2121222021201 - 2¹ = 2121222021199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121222021209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3724276 + ... + 4255898.

It is an arithmetic number, because the mean of its divisors is an integer number (103993628760).

Almost surely, 2^{2121222021201} is an apocalyptic number.

It is an amenable number.

2121222021201 is a deficient number, since it is larger than the sum of its proper divisors (1206574099119).

2121222021201 is a wasteful number, since it uses less digits than its factorization.

2121222021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540342 (or 540336 counting only the distinct ones).

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

Adding to 2121222021201 its reverse (1021202221212), we get a palindrome (3142424242413).

The spelling of 2121222021201 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-two million, twenty-one thousand, two hundred one".