121021210222220 has 144 divisors (see below), whose sum is σ = 324042173602560. Its totient is φ = 37542123964800.

The previous prime is 121021210222219. The next prime is 121021210222259. The reversal of 121021210222220 is 22222012120121.

It is a super-2 number, since 2×121021210222220² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121021210222192 and 121021210222201.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24328400 + ... + 28877559.

It is an arithmetic number, because the mean of its divisors is an integer number (2250292872240).

Almost surely, 2^{121021210222220} is an apocalyptic number.

121021210222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021210222220 is an abundant number, since it is smaller than the sum of its proper divisors (203020963380340).

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

121021210222220 is a wasteful number, since it uses less digits than its factorization.

121021210222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53206204 (or 53206195 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 121021210222220 its reverse (22222012120121), we get a palindrome (143243222342341).

The spelling of 121021210222220 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred ten million, two hundred twenty-two thousand, two hundred twenty".