121212012002220 has 240 divisors, whose sum is σ = 381584294140896. Its totient is φ = 32209664256000.

The previous prime is 121212012002219. The next prime is 121212012002251. The reversal of 121212012002220 is 22200210212121.

It is a happy number.

121212012002220 is a `hidden beast` number, since 1 + 21 + 21 + 201 + 200 + 2 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121212012002193 and 121212012002202.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 600758755 + ... + 600960485.

Almost surely, 2^{121212012002220} is an apocalyptic number.

121212012002220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121212012002220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190792147070448).

121212012002220 is an abundant number, since it is smaller than the sum of its proper divisors (260372282138676).

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

121212012002220 is a wasteful number, since it uses less digits than its factorization.

121212012002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203054 (or 203043 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121212012002220 its reverse (22200210212121), we get a palindrome (143412222214341).

The spelling of 121212012002220 in words is "one hundred twenty-one trillion, two hundred twelve billion, twelve million, two thousand, two hundred twenty".