1121000000220 has 72 divisors (see below), whose sum is σ = 3483302462640. Its totient is φ = 291642274560.

The previous prime is 1121000000213. The next prime is 1121000000231. The reversal of 1121000000220 is 220000001211.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75941130 + ... + 75955889.

It is an arithmetic number, because the mean of its divisors is an integer number (48379200870).

Almost surely, 2^{1121000000220} is an apocalyptic number.

1121000000220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121000000220 is an abundant number, since it is smaller than the sum of its proper divisors (2362302462420).

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

1121000000220 is a wasteful number, since it uses less digits than its factorization.

1121000000220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151897075 (or 151897070 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1121000000220 its reverse (220000001211), we get a palindrome (1341000001431).

Subtracting from 1121000000220 its reverse (220000001211), we obtain a palindrome (900999999009).

The spelling of 1121000000220 in words is "one trillion, one hundred twenty-one billion, two hundred twenty", and thus it is an aban number.