2121200021147 has 2 divisors, whose sum is σ = 2121200021148. Its totient is φ = 2121200021146.

The previous prime is 2121200021089. The next prime is 2121200021219. The reversal of 2121200021147 is 7411200021212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121200021147 - 2²² = 2121195826843 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121200023147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060600010573 + 1060600010574.

It is an arithmetic number, because the mean of its divisors is an integer number (1060600010574).

Almost surely, 2^{2121200021147} is an apocalyptic number.

2121200021147 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121200021147 is an equidigital number, since it uses as much as digits as its factorization.

2121200021147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 2121200021147 its reverse (7411200021212), we get a palindrome (9532400042359).

The spelling of 2121200021147 in words is "two trillion, one hundred twenty-one billion, two hundred million, twenty-one thousand, one hundred forty-seven".