111211012011220 has 72 divisors (see below), whose sum is σ = 258241580093952. Its totient is φ = 40198209965760.

The previous prime is 111211012011217. The next prime is 111211012011283. The reversal of 111211012011220 is 22110210112111.

It is a junction number, because it is equal to n+sod(n) for n = 111211012011194 and 111211012011203.

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, 137185572 + ... + 137993851.

It is an arithmetic number, because the mean of its divisors is an integer number (3586688612416).

Almost surely, 2^{111211012011220} is an apocalyptic number.

111211012011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111211012011220 is an abundant number, since it is smaller than the sum of its proper divisors (147030568082732).

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

111211012011220 is a wasteful number, since it uses less digits than its factorization.

111211012011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275179621 (or 275179608 counting only the distinct ones).

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

Adding to 111211012011220 its reverse (22110210112111), we get a palindrome (133321222123331).

The spelling of 111211012011220 in words is "one hundred eleven trillion, two hundred eleven billion, twelve million, eleven thousand, two hundred twenty".