1111202020123 has 4 divisors (see below), whose sum is σ = 1196679098608. Its totient is φ = 1025724941640.

The previous prime is 1111202020091. The next prime is 1111202020129. The reversal of 1111202020123 is 3210202021111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1111202020123 - 2⁵ = 1111202020091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111202020097 and 1111202020106.

It is not an unprimeable number, because it can be changed into a prime (1111202020129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42738539223 + ... + 42738539248.

It is an arithmetic number, because the mean of its divisors is an integer number (299169774652).

Almost surely, 2^{1111202020123} is an apocalyptic number.

1111202020123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1111202020123 is a deficient number, since it is larger than the sum of its proper divisors (85477078485).

1111202020123 is an equidigital number, since it uses as much as digits as its factorization.

1111202020123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85477078484.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1111202020123 its reverse (3210202021111), we get a palindrome (4321404041234).

The spelling of 1111202020123 in words is "one trillion, one hundred eleven billion, two hundred two million, twenty thousand, one hundred twenty-three".