2121220121051 has 2 divisors, whose sum is σ = 2121220121052. Its totient is φ = 2121220121050.

The previous prime is 2121220121029. The next prime is 2121220121071. The reversal of 2121220121051 is 1501210221212.

It is an a-pointer prime, because the next prime (2121220121071) can be obtained adding 2121220121051 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121220121051 - 2¹⁴ = 2121220104667 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121220121071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060610060525 + 1060610060526.

It is an arithmetic number, because the mean of its divisors is an integer number (1060610060526).

Almost surely, 2^{2121220121051} is an apocalyptic number.

2121220121051 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121220121051 is an equidigital number, since it uses as much as digits as its factorization.

2121220121051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 2121220121051 its reverse (1501210221212), we get a palindrome (3622430342263).

The spelling of 2121220121051 in words is "two trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, fifty-one".