120111111021 has 64 divisors (see below), whose sum is σ = 183207536640. Its totient is φ = 69326880000.

The previous prime is 120111110953. The next prime is 120111111049.

120111111021 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 120111111021 - 2⁷ = 120111110893 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120111110988 and 120111111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120111111821) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27351736 + ... + 27356126.

It is an arithmetic number, because the mean of its divisors is an integer number (2862617760).

Almost surely, 2^120111111021 is an apocalyptic number.

120111111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120111111021 is a deficient number, since it is larger than the sum of its proper divisors (63096425619).

120111111021 is a wasteful number, since it uses less digits than its factorization.

120111111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4818.

The product of its (nonzero) digits is 4, while the sum is 12.

It can be divided in two parts, 120111 and 111021, that multiplied together give a palindrome (13334843331).

The spelling of 120111111021 in words is "one hundred twenty billion, one hundred eleven million, one hundred eleven thousand, twenty-one".