210000021151 has 2 divisors, whose sum is σ = 210000021152. Its totient is φ = 210000021150.

The previous prime is 210000021149. The next prime is 210000021163. The reversal of 210000021151 is 151120000012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210000021151 - 2¹ = 210000021149 is a prime.

Together with 210000021149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210000021181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105000010575 + 105000010576.

It is an arithmetic number, because the mean of its divisors is an integer number (105000010576).

Almost surely, 2^210000021151 is an apocalyptic number.

210000021151 is a deficient number, since it is larger than the sum of its proper divisors (1).

210000021151 is an equidigital number, since it uses as much as digits as its factorization.

210000021151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 13.

Adding to 210000021151 its reverse (151120000012), we get a palindrome (361120021163).

The spelling of 210000021151 in words is "two hundred ten billion, twenty-one thousand, one hundred fifty-one".