2221220429 has 4 divisors (see below), whose sum is σ = 2224226880. Its totient is φ = 2218213980.

The previous prime is 2221220413. The next prime is 2221220431. The reversal of 2221220429 is 9240221222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2221220429 - 2⁴ = 2221220413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221220398 and 2221220407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221220489) 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, 1502117 + ... + 1503594.

It is an arithmetic number, because the mean of its divisors is an integer number (556056720).

Almost surely, 2^2221220429 is an apocalyptic number.

It is an amenable number.

2221220429 is a deficient number, since it is larger than the sum of its proper divisors (3006451).

2221220429 is an equidigital number, since it uses as much as digits as its factorization.

2221220429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3006450.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 2221220429 is about 47129.8252595954. The cubic root of 2221220429 is about 1304.7597565219.

The spelling of 2221220429 in words is "two billion, two hundred twenty-one million, two hundred twenty thousand, four hundred twenty-nine".