121221200110120 has 32 divisors (see below), whose sum is σ = 297542945725920. Its totient is φ = 44080436403520.

The previous prime is 121221200110117. The next prime is 121221200110141. The reversal of 121221200110120 is 21011002122121.

It is a super-2 number, since 2×121221200110120² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121221200110094 and 121221200110103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137751363322 + ... + 137751364201.

It is an arithmetic number, because the mean of its divisors is an integer number (9298217053935).

Almost surely, 2^{121221200110120} is an apocalyptic number.

121221200110120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121221200110120 is an abundant number, since it is smaller than the sum of its proper divisors (176321745615800).

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

121221200110120 is a wasteful number, since it uses less digits than its factorization.

121221200110120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275502727545 (or 275502727541 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121221200110120 its reverse (21011002122121), we get a palindrome (142232202232241).

It can be divided in two parts, 1212212001 and 10120, that added together give a palindrome (1212222121).

The spelling of 121221200110120 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred million, one hundred ten thousand, one hundred twenty".