1201202121101 has 2 divisors, whose sum is σ = 1201202121102. Its totient is φ = 1201202121100.

The previous prime is 1201202121059. The next prime is 1201202121109. The reversal of 1201202121101 is 1011212021021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 666623260900 + 534578860201 = 816470^2 + 731149^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201202121101 - 2¹⁸ = 1201201858957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201202121109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600601060550 + 600601060551.

It is an arithmetic number, because the mean of its divisors is an integer number (600601060551).

Almost surely, 2^{1201202121101} is an apocalyptic number.

It is an amenable number.

1201202121101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201202121101 is an equidigital number, since it uses as much as digits as its factorization.

1201202121101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1201202121101 its reverse (1011212021021), we get a palindrome (2212414142122).

The spelling of 1201202121101 in words is "one trillion, two hundred one billion, two hundred two million, one hundred twenty-one thousand, one hundred one".