121002110220 has 48 divisors (see below), whose sum is σ = 340223546880. Its totient is φ = 32132216256.

The previous prime is 121002110129. The next prime is 121002110231. The reversal of 121002110220 is 22011200121.

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

It is a junction number, because it is equal to n+sod(n) for n = 121002110196 and 121002110205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4204702 + ... + 4233381.

It is an arithmetic number, because the mean of its divisors is an integer number (7087990560).

Almost surely, 2^121002110220 is an apocalyptic number.

121002110220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121002110220 is an abundant number, since it is smaller than the sum of its proper divisors (219221436660).

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

121002110220 is a wasteful number, since it uses less digits than its factorization.

121002110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8438334 (or 8438332 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121002110220 its reverse (22011200121), we get a palindrome (143013310341).

The spelling of 121002110220 in words is "one hundred twenty-one billion, two million, one hundred ten thousand, two hundred twenty".