120100012221961 has 2 divisors, whose sum is σ = 120100012221962. Its totient is φ = 120100012221960.

The previous prime is 120100012221923. The next prime is 120100012222033. The reversal of 120100012221961 is 169122210001021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103621324455936 + 16478687766025 = 10179456^2 + 4059395^2 .

It is a cyclic number.

It is not a de Polignac number, because 120100012221961 - 2¹⁵ = 120100012189193 is a prime.

It is not a weakly prime, because it can be changed into another prime (120100012231961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60050006110980 + 60050006110981.

It is an arithmetic number, because the mean of its divisors is an integer number (60050006110981).

Almost surely, 2^{120100012221961} is an apocalyptic number.

It is an amenable number.

120100012221961 is a deficient number, since it is larger than the sum of its proper divisors (1).

120100012221961 is an equidigital number, since it uses as much as digits as its factorization.

120100012221961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 28.

Adding to 120100012221961 its reverse (169122210001021), we get a palindrome (289222222222982).

The spelling of 120100012221961 in words is "one hundred twenty trillion, one hundred billion, twelve million, two hundred twenty-one thousand, nine hundred sixty-one".