1221346004 has 12 divisors (see below), whose sum is σ = 2164411200. Its totient is φ = 602942808.

The previous prime is 1221345989. The next prime is 1221346037. The reversal of 1221346004 is 4006431221.

It is a super-2 number, since 2×1221346004² = 2983372122973536032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1932194 + ... + 1932825.

It is an arithmetic number, because the mean of its divisors is an integer number (180367600).

Almost surely, 2^1221346004 is an apocalyptic number.

It is an amenable number.

1221346004 is a deficient number, since it is larger than the sum of its proper divisors (943065196).

1221346004 is a wasteful number, since it uses less digits than its factorization.

1221346004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3865102 (or 3865100 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1221346004 is about 34947.7610727783. The cubic root of 1221346004 is about 1068.9225489152.

Adding to 1221346004 its reverse (4006431221), we get a palindrome (5227777225).

The spelling of 1221346004 in words is "one billion, two hundred twenty-one million, three hundred forty-six thousand, four".