2121121221151 has 2 divisors, whose sum is σ = 2121121221152. Its totient is φ = 2121121221150.

The previous prime is 2121121221103. The next prime is 2121121221181. The reversal of 2121121221151 is 1511221211212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121121221151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121121221181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060560610575 + 1060560610576.

It is an arithmetic number, because the mean of its divisors is an integer number (1060560610576).

Almost surely, 2^{2121121221151} is an apocalyptic number.

2121121221151 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121121221151 is an equidigital number, since it uses as much as digits as its factorization.

2121121221151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 160, while the sum is 22.

Adding to 2121121221151 its reverse (1511221211212), we get a palindrome (3632342432363).

The spelling of 2121121221151 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred fifty-one".