121011000220 has 48 divisors (see below), whose sum is σ = 277412133600. Its totient is φ = 43974328320.

The previous prime is 121011000199. The next prime is 121011000221. The reversal of 121011000220 is 22000110121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 121011000197 and 121011000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011000221) 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, 142876 + ... + 512284.

It is an arithmetic number, because the mean of its divisors is an integer number (5779419450).

Almost surely, 2^121011000220 is an apocalyptic number.

121011000220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121011000220 is an abundant number, since it is smaller than the sum of its proper divisors (156401133380).

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

121011000220 is a wasteful number, since it uses less digits than its factorization.

121011000220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370918 (or 370916 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121011000220 its reverse (22000110121), we get a palindrome (143011110341).

The spelling of 121011000220 in words is "one hundred twenty-one billion, eleven million, two hundred twenty", and thus it is an aban number.