121021122220 has 48 divisors (see below), whose sum is σ = 254840836320. Its totient is φ = 48275910144.

The previous prime is 121021122169. The next prime is 121021122223. The reversal of 121021122220 is 22221120121.

It is a happy number.

It is a super-2 number, since 2×121021122220² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121021122194 and 121021122203.

It is not an unprimeable number, because it can be changed into a prime (121021122223) 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, 30973507 + ... + 30977413.

It is an arithmetic number, because the mean of its divisors is an integer number (5309184090).

Almost surely, 2^121021122220 is an apocalyptic number.

121021122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021122220 is an abundant number, since it is smaller than the sum of its proper divisors (133819714100).

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

121021122220 is a wasteful number, since it uses less digits than its factorization.

121021122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7762 (or 7760 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121021122220 its reverse (22221120121), we get a palindrome (143242242341).

The spelling of 121021122220 in words is "one hundred twenty-one billion, twenty-one million, one hundred twenty-two thousand, two hundred twenty".