121000222012220 has 48 divisors (see below), whose sum is σ = 254415788161920. Its totient is φ = 48340061818176.

The previous prime is 121000222012151. The next prime is 121000222012249. The reversal of 121000222012220 is 22210222000121.

It is a happy number.

It is a congruent number.

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, 55407539 + ... + 57549941.

It is an arithmetic number, because the mean of its divisors is an integer number (5300328920040).

Almost surely, 2^{121000222012220} is an apocalyptic number.

121000222012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000222012220 is an abundant number, since it is smaller than the sum of its proper divisors (133415566149700).

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

121000222012220 is a wasteful number, since it uses less digits than its factorization.

121000222012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145914 (or 2145912 counting only the distinct ones).

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

Adding to 121000222012220 its reverse (22210222000121), we get a palindrome (143210444012341).

The spelling of 121000222012220 in words is "one hundred twenty-one trillion, two hundred twenty-two million, twelve thousand, two hundred twenty".