1201212130109 has 2 divisors, whose sum is σ = 1201212130110. Its totient is φ = 1201212130108.

The previous prime is 1201212130103. The next prime is 1201212130141. The reversal of 1201212130109 is 9010312121021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 686760264100 + 514451866009 = 828710^2 + 717253^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201212130109 - 2¹² = 1201212126013 is a prime.

It is a super-2 number, since 2×1201212130109² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201212130103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600606065054 + 600606065055.

It is an arithmetic number, because the mean of its divisors is an integer number (600606065055).

Almost surely, 2^{1201212130109} is an apocalyptic number.

It is an amenable number.

1201212130109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201212130109 is an equidigital number, since it uses as much as digits as its factorization.

1201212130109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 1201212130109 in words is "one trillion, two hundred one billion, two hundred twelve million, one hundred thirty thousand, one hundred nine".