2021200121249 has 2 divisors, whose sum is σ = 2021200121250. Its totient is φ = 2021200121248.

The previous prime is 2021200121201. The next prime is 2021200121257. The reversal of 2021200121249 is 9421210021202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1638929962849 + 382270158400 = 1280207^2 + 618280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021200121249 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021200121279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010600060624 + 1010600060625.

It is an arithmetic number, because the mean of its divisors is an integer number (1010600060625).

Almost surely, 2^{2021200121249} is an apocalyptic number.

It is an amenable number.

2021200121249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021200121249 is an equidigital number, since it uses as much as digits as its factorization.

2021200121249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 2021200121249 in words is "two trillion, twenty-one billion, two hundred million, one hundred twenty-one thousand, two hundred forty-nine".