2221021234 has 4 divisors (see below), whose sum is σ = 3331531854. Its totient is φ = 1110510616.

The previous prime is 2221021189. The next prime is 2221021249. The reversal of 2221021234 is 4321201222.

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

It can be written as a sum of positive squares in only one way, i.e., 1816890625 + 404130609 = 42625^2 + 20103^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555255307 + ... + 555255310.

Almost surely, 2^2221021234 is an apocalyptic number.

2221021234 is a deficient number, since it is larger than the sum of its proper divisors (1110510620).

2221021234 is a wasteful number, since it uses less digits than its factorization.

2221021234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110510619.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2221021234 is about 47127.7119537964. The cubic root of 2221021234 is about 1304.7207525302.

Adding to 2221021234 its reverse (4321201222), we get a palindrome (6542222456).

The spelling of 2221021234 in words is "two billion, two hundred twenty-one million, twenty-one thousand, two hundred thirty-four".