1123100121220 has 96 divisors (see below), whose sum is σ = 3003043921920. Its totient is φ = 342609133440.

The previous prime is 1123100121211. The next prime is 1123100121263. The reversal of 1123100121220 is 221210013211.

It is a super-2 number, since 2×1123100121220² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1123100121194 and 1123100121203.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7685980 + ... + 7830739.

It is an arithmetic number, because the mean of its divisors is an integer number (31281707520).

Almost surely, 2^{1123100121220} is an apocalyptic number.

1123100121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123100121220 is an abundant number, since it is smaller than the sum of its proper divisors (1879943800700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1123100121220 is a wasteful number, since it uses less digits than its factorization.

1123100121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15516793 (or 15516791 counting only the distinct ones).

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

Adding to 1123100121220 its reverse (221210013211), we get a palindrome (1344310134431).

The spelling of 1123100121220 in words is "one trillion, one hundred twenty-three billion, one hundred million, one hundred twenty-one thousand, two hundred twenty".