20111002229 has 2 divisors, whose sum is σ = 20111002230. Its totient is φ = 20111002228.

The previous prime is 20111002211. The next prime is 20111002253. The reversal of 20111002229 is 92220011102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20066139025 + 44863204 = 141655^2 + 6698^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111002229 - 2³² = 15816034933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20111002229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20111092229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055501114 + 10055501115.

It is an arithmetic number, because the mean of its divisors is an integer number (10055501115).

Almost surely, 2^20111002229 is an apocalyptic number.

It is an amenable number.

20111002229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111002229 is an equidigital number, since it uses as much as digits as its factorization.

20111002229 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 20.

The spelling of 20111002229 in words is "twenty billion, one hundred eleven million, two thousand, two hundred twenty-nine".