1221000122701 has 2 divisors, whose sum is σ = 1221000122702. Its totient is φ = 1221000122700.

The previous prime is 1221000122651. The next prime is 1221000122753. The reversal of 1221000122701 is 1072210001221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 625056266025 + 595943856676 = 790605^2 + 771974^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221000122701 - 2⁹ = 1221000122189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221000122101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610500061350 + 610500061351.

It is an arithmetic number, because the mean of its divisors is an integer number (610500061351).

Almost surely, 2^{1221000122701} is an apocalyptic number.

It is an amenable number.

1221000122701 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221000122701 is an equidigital number, since it uses as much as digits as its factorization.

1221000122701 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 19.

Adding to 1221000122701 its reverse (1072210001221), we get a palindrome (2293210123922).

The spelling of 1221000122701 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two thousand, seven hundred one".