121222110121020 has 768 divisors, whose sum is σ = 411676009113600. Its totient is φ = 29493007810560.

The previous prime is 121222110120949. The next prime is 121222110121031. The reversal of 121222110121020 is 20121011222121.

121222110121020 is a `hidden beast` number, since 1 + 212 + 221 + 1 + 0 + 1 + 210 + 20 = 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 = 121222110120984 and 121222110121002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 56303812264 + ... + 56303814416.

It is an arithmetic number, because the mean of its divisors is an integer number (536036470200).

Almost surely, 2^{121222110121020} is an apocalyptic number.

121222110121020 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 121222110121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205838004556800).

121222110121020 is an abundant number, since it is smaller than the sum of its proper divisors (290453898992580).

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

121222110121020 is a wasteful number, since it uses less digits than its factorization.

121222110121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3115 (or 3107 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121222110121020 its reverse (20121011222121), we get a palindrome (141343121343141).

The spelling of 121222110121020 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, one hundred ten million, one hundred twenty-one thousand, twenty".