29221312217 has 2 divisors, whose sum is σ = 29221312218. Its totient is φ = 29221312216.

The previous prime is 29221312147. The next prime is 29221312229. The reversal of 29221312217 is 71221312292.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25201245001 + 4020067216 = 158749^2 + 63404^2 .

It is a cyclic number.

It is not a de Polignac number, because 29221312217 - 2¹² = 29221308121 is a prime.

It is not a weakly prime, because it can be changed into another prime (29221312817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14610656108 + 14610656109.

It is an arithmetic number, because the mean of its divisors is an integer number (14610656109).

Almost surely, 2^29221312217 is an apocalyptic number.

It is an amenable number.

29221312217 is a deficient number, since it is larger than the sum of its proper divisors (1).

29221312217 is an equidigital number, since it uses as much as digits as its factorization.

29221312217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The spelling of 29221312217 in words is "twenty-nine billion, two hundred twenty-one million, three hundred twelve thousand, two hundred seventeen".