1231222004 has 6 divisors (see below), whose sum is σ = 2154638514. Its totient is φ = 615611000.

The previous prime is 1231222001. The next prime is 1231222007. The reversal of 1231222004 is 4002221321.

It is an interprime number because it is at equal distance from previous prime (1231222001) and next prime (1231222007).

It can be written as a sum of positive squares in only one way, i.e., 623500900 + 607721104 = 24970^2 + 24652^2 .

It is a super-3 number, since 3×1231222004³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231222001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153902747 + ... + 153902754.

It is an arithmetic number, because the mean of its divisors is an integer number (359106419).

Almost surely, 2^1231222004 is an apocalyptic number.

It is an amenable number.

1231222004 is a deficient number, since it is larger than the sum of its proper divisors (923416510).

1231222004 is a wasteful number, since it uses less digits than its factorization.

1231222004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307805505 (or 307805503 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1231222004 is about 35088.7731902955. The cubic root of 1231222004 is about 1071.7959775928.

Adding to 1231222004 its reverse (4002221321), we get a palindrome (5233443325).

The spelling of 1231222004 in words is "one billion, two hundred thirty-one million, two hundred twenty-two thousand, four".