1213210429 has 2 divisors, whose sum is σ = 1213210430. Its totient is φ = 1213210428.

The previous prime is 1213210393. The next prime is 1213210489. The reversal of 1213210429 is 9240123121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 975125529 + 238084900 = 31227^2 + 15430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213210429 - 2¹⁵ = 1213177661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213210489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606605214 + 606605215.

It is an arithmetic number, because the mean of its divisors is an integer number (606605215).

Almost surely, 2^1213210429 is an apocalyptic number.

It is an amenable number.

1213210429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213210429 is an equidigital number, since it uses as much as digits as its factorization.

1213210429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1213210429 is about 34831.1703650624. The cubic root of 1213210429 is about 1066.5438398392.

The spelling of 1213210429 in words is "one billion, two hundred thirteen million, two hundred ten thousand, four hundred twenty-nine".