1201000221101 has 2 divisors, whose sum is σ = 1201000221102. Its totient is φ = 1201000221100.

The previous prime is 1201000221067. The next prime is 1201000221103. The reversal of 1201000221101 is 1011220001021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 824556618601 + 376443602500 = 908051^2 + 613550^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201000221101 - 2¹⁸ = 1200999958957 is a prime.

Together with 1201000221103, 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 (1201000221103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600500110550 + 600500110551.

It is an arithmetic number, because the mean of its divisors is an integer number (600500110551).

Almost surely, 2^{1201000221101} is an apocalyptic number.

It is an amenable number.

1201000221101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201000221101 is an equidigital number, since it uses as much as digits as its factorization.

1201000221101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1201000221101 its reverse (1011220001021), we get a palindrome (2212220222122).

The spelling of 1201000221101 in words is "one trillion, two hundred one billion, two hundred twenty-one thousand, one hundred one".