1201011021229 has 2 divisors, whose sum is σ = 1201011021230. Its totient is φ = 1201011021228.

The previous prime is 1201011021191. The next prime is 1201011021233. The reversal of 1201011021229 is 9221201101021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 712547015625 + 488464005604 = 844125^2 + 698902^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201011021229 is a prime.

It is a super-2 number, since 2×1201011021229² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201011021269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600505510614 + 600505510615.

It is an arithmetic number, because the mean of its divisors is an integer number (600505510615).

Almost surely, 2^{1201011021229} is an apocalyptic number.

It is an amenable number.

1201011021229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201011021229 is an equidigital number, since it uses as much as digits as its factorization.

1201011021229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 1201011021229 in words is "one trillion, two hundred one billion, eleven million, twenty-one thousand, two hundred twenty-nine".