123020111001 has 16 divisors (see below), whose sum is σ = 165670113600. Its totient is φ = 81191947200.

The previous prime is 123020110981. The next prime is 123020111029. The reversal of 123020111001 is 100111020321.

It is not a de Polignac number, because 123020111001 - 2¹⁹ = 123019586713 is a prime.

It is a super-2 number, since 2×123020111001² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123020111051) 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, 3405631 + ... + 3441563.

It is an arithmetic number, because the mean of its divisors is an integer number (10354382100).

Almost surely, 2^123020111001 is an apocalyptic number.

It is an amenable number.

123020111001 is a deficient number, since it is larger than the sum of its proper divisors (42650002599).

123020111001 is a wasteful number, since it uses less digits than its factorization.

123020111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47336.

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

Adding to 123020111001 its reverse (100111020321), we get a palindrome (223131131322).

The spelling of 123020111001 in words is "one hundred twenty-three billion, twenty million, one hundred eleven thousand, one".