2120212201221 has 32 divisors (see below), whose sum is σ = 3148003595520. Its totient is φ = 1410348920832.

The previous prime is 2120212201201. The next prime is 2120212201259. The reversal of 2120212201221 is 1221022120212.

It is a happy number.

2120212201221 is a `hidden beast` number, since 21 + 202 + 1 + 220 + 1 + 221 = 666.

It is not a de Polignac number, because 2120212201221 - 2¹⁷ = 2120212070149 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2120212201194 and 2120212201203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120212201201) 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, 149799481 + ... + 149813633.

It is an arithmetic number, because the mean of its divisors is an integer number (98375112360).

Almost surely, 2^{2120212201221} is an apocalyptic number.

It is an amenable number.

2120212201221 is a deficient number, since it is larger than the sum of its proper divisors (1027791394299).

2120212201221 is a wasteful number, since it uses less digits than its factorization.

2120212201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26042 (or 26036 counting only the distinct ones).

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

Adding to 2120212201221 its reverse (1221022120212), we get a palindrome (3341234321433).

The spelling of 2120212201221 in words is "two trillion, one hundred twenty billion, two hundred twelve million, two hundred one thousand, two hundred twenty-one".