1121112021220 has 48 divisors (see below), whose sum is σ = 2407709219328. Its totient is φ = 438304383360.

The previous prime is 1121112021209. The next prime is 1121112021221. The reversal of 1121112021220 is 221202111211.

It is a junction number, because it is equal to n+sod(n) for n = 1121112021194 and 1121112021203.

It is not an unprimeable number, because it can be changed into a prime (1121112021221) 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, 124536 + ... + 1502575.

It is an arithmetic number, because the mean of its divisors is an integer number (50160608736).

Almost surely, 2^{1121112021220} is an apocalyptic number.

1121112021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121112021220 is an abundant number, since it is smaller than the sum of its proper divisors (1286597198108).

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

1121112021220 is a wasteful number, since it uses less digits than its factorization.

1121112021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627900 (or 1627898 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1121112021220 its reverse (221202111211), we get a palindrome (1342314132431).

The spelling of 1121112021220 in words is "one trillion, one hundred twenty-one billion, one hundred twelve million, twenty-one thousand, two hundred twenty".