1001201221051 has 2 divisors, whose sum is σ = 1001201221052. Its totient is φ = 1001201221050.

The previous prime is 1001201221049. The next prime is 1001201221121. The reversal of 1001201221051 is 1501221021001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1001201221051 - 2¹ = 1001201221049 is a prime.

Together with 1001201221049, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1001201221651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500600610525 + 500600610526.

It is an arithmetic number, because the mean of its divisors is an integer number (500600610526).

Almost surely, 2^{1001201221051} is an apocalyptic number.

1001201221051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001201221051 is an equidigital number, since it uses as much as digits as its factorization.

1001201221051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 1001201221051 its reverse (1501221021001), we get a palindrome (2502422242052).

The spelling of 1001201221051 in words is "one trillion, one billion, two hundred one million, two hundred twenty-one thousand, fifty-one".