21003214229 has 2 divisors, whose sum is σ = 21003214230. Its totient is φ = 21003214228.

The previous prime is 21003214189. The next prime is 21003214259. The reversal of 21003214229 is 92241230012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12970932100 + 8032282129 = 113890^2 + 89623^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21003214229 is a prime.

It is a super-2 number, since 2×21003214229² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003214198 and 21003214207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21003214259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501607114 + 10501607115.

It is an arithmetic number, because the mean of its divisors is an integer number (10501607115).

Almost surely, 2^21003214229 is an apocalyptic number.

It is an amenable number.

21003214229 is a deficient number, since it is larger than the sum of its proper divisors (1).

21003214229 is an equidigital number, since it uses as much as digits as its factorization.

21003214229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 21003214229 in words is "twenty-one billion, three million, two hundred fourteen thousand, two hundred twenty-nine".