1201230010021 has 2 divisors, whose sum is σ = 1201230010022. Its totient is φ = 1201230010020.

The previous prime is 1201230009971. The next prime is 1201230010051. The reversal of 1201230010021 is 1200100321021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1025743584100 + 175486425921 = 1012790^2 + 418911^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201230010021 - 2²¹ = 1201227912869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201230009983 and 1201230010010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201230010051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600615005010 + 600615005011.

It is an arithmetic number, because the mean of its divisors is an integer number (600615005011).

Almost surely, 2^{1201230010021} is an apocalyptic number.

It is an amenable number.

1201230010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201230010021 is an equidigital number, since it uses as much as digits as its factorization.

1201230010021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1201230010021 its reverse (1200100321021), we get a palindrome (2401330331042).

The spelling of 1201230010021 in words is "one trillion, two hundred one billion, two hundred thirty million, ten thousand, twenty-one".