2120100402221 has 2 divisors, whose sum is σ = 2120100402222. Its totient is φ = 2120100402220.

The previous prime is 2120100402127. The next prime is 2120100402241. The reversal of 2120100402221 is 1222040010212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1612864440196 + 507235962025 = 1269986^2 + 712205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120100402221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2120100402221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120100402241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060050201110 + 1060050201111.

It is an arithmetic number, because the mean of its divisors is an integer number (1060050201111).

Almost surely, 2^{2120100402221} is an apocalyptic number.

It is an amenable number.

2120100402221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120100402221 is an equidigital number, since it uses as much as digits as its factorization.

2120100402221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2120100402221 its reverse (1222040010212), we get a palindrome (3342140412433).

The spelling of 2120100402221 in words is "two trillion, one hundred twenty billion, one hundred million, four hundred two thousand, two hundred twenty-one".