221021001210029 has 2 divisors, whose sum is σ = 221021001210030. Its totient is φ = 221021001210028.

The previous prime is 221021001210013. The next prime is 221021001210223. The reversal of 221021001210029 is 920012100120122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212208997086025 + 8812004124004 = 14567395^2 + 2968502^2 .

It is a cyclic number.

It is not a de Polignac number, because 221021001210029 - 2⁴ = 221021001210013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221021001209986 and 221021001210013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221021001213029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510500605014 + 110510500605015.

It is an arithmetic number, because the mean of its divisors is an integer number (110510500605015).

Almost surely, 2^{221021001210029} is an apocalyptic number.

It is an amenable number.

221021001210029 is a deficient number, since it is larger than the sum of its proper divisors (1).

221021001210029 is an equidigital number, since it uses as much as digits as its factorization.

221021001210029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 221021001210029 in words is "two hundred twenty-one trillion, twenty-one billion, one million, two hundred ten thousand, twenty-nine".