1111020011220 has 72 divisors (see below), whose sum is σ = 3618750903264. Its totient is φ = 253947430464.

The previous prime is 1111020011147. The next prime is 1111020011347. The reversal of 1111020011220 is 221100201111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1111020011196 and 1111020011205.

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, 188946042 + ... + 188951921.

It is an arithmetic number, because the mean of its divisors is an integer number (50260429212).

Almost surely, 2^{1111020011220} is an apocalyptic number.

1111020011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111020011220 is an abundant number, since it is smaller than the sum of its proper divisors (2507730892044).

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

1111020011220 is a wasteful number, since it uses less digits than its factorization.

1111020011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377897989 (or 377897980 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1111020011220 its reverse (221100201111), we get a palindrome (1332120212331).

The spelling of 1111020011220 in words is "one trillion, one hundred eleven billion, twenty million, eleven thousand, two hundred twenty".