121100111112220 has 48 divisors (see below), whose sum is σ = 254668813717248. Its totient is φ = 48371749470720.

The previous prime is 121100111112217. The next prime is 121100111112221. The reversal of 121100111112220 is 22211111001121.

It is a super-2 number, since 2×121100111112220² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121100111112194 and 121100111112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100111112221) 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, 341796760 + ... + 342150880.

It is an arithmetic number, because the mean of its divisors is an integer number (5305600285776).

Almost surely, 2^{121100111112220} is an apocalyptic number.

121100111112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100111112220 is an abundant number, since it is smaller than the sum of its proper divisors (133568702605028).

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

121100111112220 is a wasteful number, since it uses less digits than its factorization.

121100111112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378190 (or 378188 counting only the distinct ones).

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

Adding to 121100111112220 its reverse (22211111001121), we get a palindrome (143311222113341).

It can be divided in two parts, 12110011 and 1112220, that added together give a palindrome (13222231).

The spelling of 121100111112220 in words is "one hundred twenty-one trillion, one hundred billion, one hundred eleven million, one hundred twelve thousand, two hundred twenty".