21000213010291 has 2 divisors, whose sum is σ = 21000213010292. Its totient is φ = 21000213010290.

The previous prime is 21000213010193. The next prime is 21000213010303. The reversal of 21000213010291 is 19201031200012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21000213010291 - 2³¹ = 20998065526643 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000213010391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500106505145 + 10500106505146.

It is an arithmetic number, because the mean of its divisors is an integer number (10500106505146).

Almost surely, 2^{21000213010291} is an apocalyptic number.

21000213010291 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000213010291 is an equidigital number, since it uses as much as digits as its factorization.

21000213010291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 21000213010291 in words is "twenty-one trillion, two hundred thirteen million, ten thousand, two hundred ninety-one".