1213101229 has 2 divisors, whose sum is σ = 1213101230. Its totient is φ = 1213101228.

The previous prime is 1213101223. The next prime is 1213101271. The reversal of 1213101229 is 9221013121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 634939204 + 578162025 = 25198^2 + 24045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213101229 is a prime.

It is a super-2 number, since 2×1213101229² = 2943229183602620882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213101223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606550614 + 606550615.

It is an arithmetic number, because the mean of its divisors is an integer number (606550615).

Almost surely, 2^1213101229 is an apocalyptic number.

It is an amenable number.

1213101229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213101229 is an equidigital number, since it uses as much as digits as its factorization.

1213101229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1213101229 is about 34829.6027683349. The cubic root of 1213101229 is about 1066.5118393225.

The spelling of 1213101229 in words is "one billion, two hundred thirteen million, one hundred one thousand, two hundred twenty-nine".