2121022229 has 4 divisors (see below), whose sum is σ = 2128907340. Its totient is φ = 2113137120.

The previous prime is 2121022223. The next prime is 2121022249. The reversal of 2121022229 is 9222201212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39564100 + 2081458129 = 6290^2 + 45623^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121022229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121022223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3942152 + ... + 3942689.

It is an arithmetic number, because the mean of its divisors is an integer number (532226835).

Almost surely, 2^2121022229 is an apocalyptic number.

It is an amenable number.

2121022229 is a deficient number, since it is larger than the sum of its proper divisors (7885111).

2121022229 is an equidigital number, since it uses as much as digits as its factorization.

2121022229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7885110.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 2121022229 is about 46054.5570926483. The cubic root of 2121022229 is about 1284.8381005938.

The spelling of 2121022229 in words is "two billion, one hundred twenty-one million, twenty-two thousand, two hundred twenty-nine".