121102211001220 has 48 divisors (see below), whose sum is σ = 275003569048320. Its totient is φ = 44621390380544.

The previous prime is 121102211001199. The next prime is 121102211001229. The reversal of 121102211001220 is 22100112201121.

It is a junction number, because it is equal to n+sod(n) for n = 121102211001194 and 121102211001203.

It is not an unprimeable number, because it can be changed into a prime (121102211001229) 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, 3789164590 + ... + 3789196549.

It is an arithmetic number, because the mean of its divisors is an integer number (5729241021840).

Almost surely, 2^{121102211001220} is an apocalyptic number.

121102211001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121102211001220 is an abundant number, since it is smaller than the sum of its proper divisors (153901358047100).

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

121102211001220 is a wasteful number, since it uses less digits than its factorization.

121102211001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7578361212 (or 7578361210 counting only the distinct ones).

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

Adding to 121102211001220 its reverse (22100112201121), we get a palindrome (143202323202341).

The spelling of 121102211001220 in words is "one hundred twenty-one trillion, one hundred two billion, two hundred eleven million, one thousand, two hundred twenty".