1201122011021 has 2 divisors, whose sum is σ = 1201122011022. Its totient is φ = 1201122011020.

The previous prime is 1201122010927. The next prime is 1201122011077. The reversal of 1201122011021 is 1201102211021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 783658710025 + 417463300996 = 885245^2 + 646114^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201122011021 - 2³⁰ = 1200048269197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201122010987 and 1201122011005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201122011321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600561005510 + 600561005511.

It is an arithmetic number, because the mean of its divisors is an integer number (600561005511).

Almost surely, 2^{1201122011021} is an apocalyptic number.

It is an amenable number.

1201122011021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201122011021 is an equidigital number, since it uses as much as digits as its factorization.

1201122011021 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 1201122011021 its reverse (1201102211021), we get a palindrome (2402224222042).

The spelling of 1201122011021 in words is "one trillion, two hundred one billion, one hundred twenty-two million, eleven thousand, twenty-one".