121222220220 has 60 divisors (see below), whose sum is σ = 380278599624. Its totient is φ = 32325924960.

The previous prime is 121222220183. The next prime is 121222220221. The reversal of 121222220220 is 22022222121.

121222220220 is a `hidden beast` number, since 1 + 2 + 1 + 222 + 220 + 220 = 666.

121222220220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

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 = 121222220193 and 121222220202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222220221) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 37412646 + ... + 37415885.

Almost surely, 2^121222220220 is an apocalyptic number.

121222220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121222220220 is an abundant number, since it is smaller than the sum of its proper divisors (259056379404).

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

121222220220 is a wasteful number, since it uses less digits than its factorization.

121222220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74828552 (or 74828541 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 121222220220 its reverse (22022222121), we get a palindrome (143244442341).

The spelling of 121222220220 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty thousand, two hundred twenty".