1220334621 has 32 divisors (see below), whose sum is σ = 1870663680. Its totient is φ = 700392000.

The previous prime is 1220334617. The next prime is 1220334671. The reversal of 1220334621 is 1264330221.

It is not a de Polignac number, because 1220334621 - 2² = 1220334617 is a prime.

It is a super-2 number, since 2×1220334621² = 2978433174422427282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220334591 and 1220334600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220334601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68700 + ... + 84618.

It is an arithmetic number, because the mean of its divisors is an integer number (58458240).

Almost surely, 2^1220334621 is an apocalyptic number.

1220334621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220334621 is a deficient number, since it is larger than the sum of its proper divisors (650329059).

1220334621 is a wasteful number, since it uses less digits than its factorization.

1220334621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16057.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1220334621 is about 34933.2881504161. The cubic root of 1220334621 is about 1068.6274131549.

Adding to 1220334621 its reverse (1264330221), we get a palindrome (2484664842).

The spelling of 1220334621 in words is "one billion, two hundred twenty million, three hundred thirty-four thousand, six hundred twenty-one".