120213320261 has 2 divisors, whose sum is σ = 120213320262. Its totient is φ = 120213320260.

The previous prime is 120213320239. The next prime is 120213320263. The reversal of 120213320261 is 162023312021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71815960225 + 48397360036 = 267985^2 + 219994^2 .

It is a cyclic number.

It is not a de Polignac number, because 120213320261 - 2¹⁸ = 120213058117 is a prime.

Together with 120213320263, 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 (120213320263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60106660130 + 60106660131.

It is an arithmetic number, because the mean of its divisors is an integer number (60106660131).

Almost surely, 2^120213320261 is an apocalyptic number.

It is an amenable number.

120213320261 is a deficient number, since it is larger than the sum of its proper divisors (1).

120213320261 is an equidigital number, since it uses as much as digits as its factorization.

120213320261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 120213320261 its reverse (162023312021), we get a palindrome (282236632282).

The spelling of 120213320261 in words is "one hundred twenty billion, two hundred thirteen million, three hundred twenty thousand, two hundred sixty-one".