210021011012149 has 2 divisors, whose sum is σ = 210021011012150. Its totient is φ = 210021011012148.

The previous prime is 210021011012089. The next prime is 210021011012179. The reversal of 210021011012149 is 941210110120012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157301939588049 + 52719071424100 = 12542007^2 + 7260790^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021011012149 - 2²³ = 210021002623541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210021011012179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010505506074 + 105010505506075.

It is an arithmetic number, because the mean of its divisors is an integer number (105010505506075).

Almost surely, 2^{210021011012149} is an apocalyptic number.

It is an amenable number.

210021011012149 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021011012149 is an equidigital number, since it uses as much as digits as its factorization.

210021011012149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 210021011012149 in words is "two hundred ten trillion, twenty-one billion, eleven million, twelve thousand, one hundred forty-nine".