1220811662 has 16 divisors (see below), whose sum is σ = 2093701632. Its totient is φ = 522984600.

The previous prime is 1220811661. The next prime is 1220811671. The reversal of 1220811662 is 2661180221.

It is a super-2 number, since 2×1220811662² = 2980762228150404488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220811661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18623 + ... + 52805.

It is an arithmetic number, because the mean of its divisors is an integer number (130856352).

Almost surely, 2^1220811662 is an apocalyptic number.

1220811662 is a deficient number, since it is larger than the sum of its proper divisors (872889970).

1220811662 is a wasteful number, since it uses less digits than its factorization.

1220811662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36743.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 1220811662 is about 34940.1153690139. The cubic root of 1220811662 is about 1068.7666407267.

Adding to 1220811662 its reverse (2661180221), we get a palindrome (3881991883).

The spelling of 1220811662 in words is "one billion, two hundred twenty million, eight hundred eleven thousand, six hundred sixty-two".