2121111229 has 2 divisors, whose sum is σ = 2121111230. Its totient is φ = 2121111228.

The previous prime is 2121111217. The next prime is 2121111241. The reversal of 2121111229 is 9221111212.

It is a balanced prime because it is at equal distance from previous prime (2121111217) and next prime (2121111241).

It can be written as a sum of positive squares in only one way, i.e., 1336999225 + 784112004 = 36565^2 + 28002^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121111229 - 2¹⁷ = 2120980157 is a prime.

It is a super-3 number, since 3×2121111229³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121111299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060555614 + 1060555615.

It is an arithmetic number, because the mean of its divisors is an integer number (1060555615).

Almost surely, 2^2121111229 is an apocalyptic number.

It is an amenable number.

2121111229 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121111229 is an equidigital number, since it uses as much as digits as its factorization.

2121111229 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2121111229 is about 46055.5233278268. The cubic root of 2121111229 is about 1284.8560713298.

The spelling of 2121111229 in words is "two billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-nine".