1200112010021 has 2 divisors, whose sum is σ = 1200112010022. Its totient is φ = 1200112010020.

The previous prime is 1200112009913. The next prime is 1200112010033. The reversal of 1200112010021 is 1200102110021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 954110889796 + 246001120225 = 976786^2 + 495985^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200112010021 - 2³⁴ = 1182932140837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200112009984 and 1200112010011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200112010221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600056005010 + 600056005011.

It is an arithmetic number, because the mean of its divisors is an integer number (600056005011).

Almost surely, 2^{1200112010021} is an apocalyptic number.

It is an amenable number.

1200112010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200112010021 is an equidigital number, since it uses as much as digits as its factorization.

1200112010021 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 1200112010021 its reverse (1200102110021), we get a palindrome (2400214120042).

The spelling of 1200112010021 in words is "one trillion, two hundred billion, one hundred twelve million, ten thousand, twenty-one".