120121221071 has 2 divisors, whose sum is σ = 120121221072. Its totient is φ = 120121221070.

The previous prime is 120121221047. The next prime is 120121221113. The reversal of 120121221071 is 170122121021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120121221071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120121221371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60060610535 + 60060610536.

It is an arithmetic number, because the mean of its divisors is an integer number (60060610536).

Almost surely, 2^120121221071 is an apocalyptic number.

120121221071 is a deficient number, since it is larger than the sum of its proper divisors (1).

120121221071 is an equidigital number, since it uses as much as digits as its factorization.

120121221071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 120121221071 its reverse (170122121021), we get a palindrome (290243342092).

The spelling of 120121221071 in words is "one hundred twenty billion, one hundred twenty-one million, two hundred twenty-one thousand, seventy-one".