1220011023 has 16 divisors (see below), whose sum is σ = 2028070656. Its totient is φ = 633771840.

The previous prime is 1220011003. The next prime is 1220011031. The reversal of 1220011023 is 3201100221.

It is not a de Polignac number, because 1220011023 - 2⁶ = 1220010959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220011003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2640486 + ... + 2640947.

It is an arithmetic number, because the mean of its divisors is an integer number (126754416).

Almost surely, 2^1220011023 is an apocalyptic number.

1220011023 is a deficient number, since it is larger than the sum of its proper divisors (808059633).

1220011023 is a wasteful number, since it uses less digits than its factorization.

1220011023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5281454.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1220011023 is about 34928.6561865755. The cubic root of 1220011023 is about 1068.5329482821.

Adding to 1220011023 its reverse (3201100221), we get a palindrome (4421111244).

The spelling of 1220011023 in words is "one billion, two hundred twenty million, eleven thousand, twenty-three".