1121311212220 has 48 divisors (see below), whose sum is σ = 2394035584416. Its totient is φ = 441046368000.

The previous prime is 1121311212199. The next prime is 1121311212257. The reversal of 1121311212220 is 222121131211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4227930 + ... + 4485310.

It is an arithmetic number, because the mean of its divisors is an integer number (49875741342).

Almost surely, 2^{1121311212220} is an apocalyptic number.

1121311212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121311212220 is an abundant number, since it is smaller than the sum of its proper divisors (1272724372196).

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

1121311212220 is a wasteful number, since it uses less digits than its factorization.

1121311212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261022 (or 261020 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1121311212220 its reverse (222121131211), we get a palindrome (1343432343431).

The spelling of 1121311212220 in words is "one trillion, one hundred twenty-one billion, three hundred eleven million, two hundred twelve thousand, two hundred twenty".