123220013011 has 16 divisors (see below), whose sum is σ = 128097220608. Its totient is φ = 118434433600.

The previous prime is 123220012973. The next prime is 123220013089. The reversal of 123220013011 is 110310022321.

It is a cyclic number.

It is not a de Polignac number, because 123220013011 - 2³¹ = 121072529363 is a prime.

It is a super-2 number, since 2×123220013011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123220013311) 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, 4139166 + ... + 4168828.

It is an arithmetic number, because the mean of its divisors is an integer number (8006076288).

Almost surely, 2^123220013011 is an apocalyptic number.

123220013011 is a deficient number, since it is larger than the sum of its proper divisors (4877207597).

123220013011 is a wasteful number, since it uses less digits than its factorization.

123220013011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31202.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 123220013011 its reverse (110310022321), we get a palindrome (233530035332).

The spelling of 123220013011 in words is "one hundred twenty-three billion, two hundred twenty million, thirteen thousand, eleven".