121021222220 has 48 divisors (see below), whose sum is σ = 256793247648. Its totient is φ = 47904944640.

The previous prime is 121021222213. The next prime is 121021222249. The reversal of 121021222220 is 22222120121.

It is a happy number.

It is a super-2 number, since 2×121021222220² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2009750 + ... + 2069090.

It is an arithmetic number, because the mean of its divisors is an integer number (5349859326).

Almost surely, 2^121021222220 is an apocalyptic number.

121021222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021222220 is an abundant number, since it is smaller than the sum of its proper divisors (135772025428).

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

121021222220 is a wasteful number, since it uses less digits than its factorization.

121021222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60410 (or 60408 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 121021222220 its reverse (22222120121), we get a palindrome (143243342341).

The spelling of 121021222220 in words is "one hundred twenty-one billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty".