1220531101 has 8 divisors (see below), whose sum is σ = 1326214400. Its totient is φ = 1118992320.

The previous prime is 1220531093. The next prime is 1220531107. The reversal of 1220531101 is 1011350221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220531101 - 2³ = 1220531093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220531107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1035516 + ... + 1036693.

It is an arithmetic number, because the mean of its divisors is an integer number (165776800).

Almost surely, 2^1220531101 is an apocalyptic number.

It is an amenable number.

1220531101 is a deficient number, since it is larger than the sum of its proper divisors (105683299).

1220531101 is a wasteful number, since it uses less digits than its factorization.

1220531101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072259.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1220531101 is about 34936.1002546077. The cubic root of 1220531101 is about 1068.6847615365.

Adding to 1220531101 its reverse (1011350221), we get a palindrome (2231881322).

The spelling of 1220531101 in words is "one billion, two hundred twenty million, five hundred thirty-one thousand, one hundred one".