121102210020 has 48 divisors (see below), whose sum is σ = 369912207168. Its totient is φ = 29358111360.

The previous prime is 121102210003. The next prime is 121102210079. The reversal of 121102210020 is 20012201121.

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 = 121102209978 and 121102210005.

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, 91743439 + ... + 91744758.

It is an arithmetic number, because the mean of its divisors is an integer number (7706504316).

Almost surely, 2^121102210020 is an apocalyptic number.

121102210020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121102210020 is an abundant number, since it is smaller than the sum of its proper divisors (248809997148).

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

121102210020 is a wasteful number, since it uses less digits than its factorization.

121102210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183488220 (or 183488218 counting only the distinct ones).

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

Adding to 121102210020 its reverse (20012201121), we get a palindrome (141114411141).

The spelling of 121102210020 in words is "one hundred twenty-one billion, one hundred two million, two hundred ten thousand, twenty".