210111000021029 has 2 divisors, whose sum is σ = 210111000021030. Its totient is φ = 210111000021028.

The previous prime is 210111000020981. The next prime is 210111000021031. The reversal of 210111000021029 is 920120000111012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209609733189025 + 501266832004 = 14477905^2 + 708002^2 .

It is a cyclic number.

It is not a de Polignac number, because 210111000021029 - 2¹² = 210111000016933 is a prime.

Together with 210111000021031, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210111000021029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210111000021529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105055500010514 + 105055500010515.

It is an arithmetic number, because the mean of its divisors is an integer number (105055500010515).

Almost surely, 2^{210111000021029} is an apocalyptic number.

It is an amenable number.

210111000021029 is a deficient number, since it is larger than the sum of its proper divisors (1).

210111000021029 is an equidigital number, since it uses as much as digits as its factorization.

210111000021029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 210111000021029 in words is "two hundred ten trillion, one hundred eleven billion, twenty-one thousand, twenty-nine".