1220110121100 has 144 divisors (see below), whose sum is σ = 3835383082272. Its totient is φ = 297676861440.

The previous prime is 1220110121089. The next prime is 1220110121123. The reversal of 1220110121100 is 11210110221.

It is a super-2 number, since 2×1220110121100² (a number of 25 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 943587 + ... + 1824986.

It is an arithmetic number, because the mean of its divisors is an integer number (26634604738).

Almost surely, 2^{1220110121100} is an apocalyptic number.

1220110121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220110121100 is an abundant number, since it is smaller than the sum of its proper divisors (2615272961172).

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

1220110121100 is a wasteful number, since it uses less digits than its factorization.

1220110121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768716 (or 2768709 counting only the distinct ones).

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

Adding to 1220110121100 its reverse (11210110221), we get a palindrome (1231320231321).

It can be divided in two parts, 1220110121 and 100, that added together give a palindrome (1220110221).

The spelling of 1220110121100 in words is "one trillion, two hundred twenty billion, one hundred ten million, one hundred twenty-one thousand, one hundred".