2141423775221 has 2 divisors, whose sum is σ = 2141423775222. Its totient is φ = 2141423775220.

The previous prime is 2141423775209. The next prime is 2141423775223. The reversal of 2141423775221 is 1225773241412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1995125175121 + 146298600100 = 1412489^2 + 382490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2141423775221 is a prime.

Together with 2141423775223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2141423775223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070711887610 + 1070711887611.

It is an arithmetic number, because the mean of its divisors is an integer number (1070711887611).

Almost surely, 2^{2141423775221} is an apocalyptic number.

It is an amenable number.

2141423775221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2141423775221 is an equidigital number, since it uses as much as digits as its factorization.

2141423775221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 41.

The spelling of 2141423775221 in words is "two trillion, one hundred forty-one billion, four hundred twenty-three million, seven hundred seventy-five thousand, two hundred twenty-one".