1201120010021 has 2 divisors, whose sum is σ = 1201120010022. Its totient is φ = 1201120010020.

The previous prime is 1201120009981. The next prime is 1201120010053. The reversal of 1201120010021 is 1200100211021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 603651302500 + 597468707521 = 776950^2 + 772961^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201120010021 - 2¹⁰ = 1201120008997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201120009984 and 1201120010011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201120016021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600560005010 + 600560005011.

It is an arithmetic number, because the mean of its divisors is an integer number (600560005011).

Almost surely, 2^{1201120010021} is an apocalyptic number.

It is an amenable number.

1201120010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201120010021 is an equidigital number, since it uses as much as digits as its factorization.

1201120010021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1201120010021 its reverse (1200100211021), we get a palindrome (2401220221042).

The spelling of 1201120010021 in words is "one trillion, two hundred one billion, one hundred twenty million, ten thousand, twenty-one".