121222000000020 has 96 divisors (see below), whose sum is σ = 339726417085440. Its totient is φ = 32296848629760.

The previous prime is 121221999999949. The next prime is 121222000000043. The reversal of 121222000000020 is 20000000222121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121221999999942 and 121222000000005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 322870324 + ... + 323245556.

It is an arithmetic number, because the mean of its divisors is an integer number (3538816844640).

Almost surely, 2^{121222000000020} is an apocalyptic number.

121222000000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121222000000020 is an abundant number, since it is smaller than the sum of its proper divisors (218504417085420).

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

121222000000020 is a wasteful number, since it uses less digits than its factorization.

121222000000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380065 (or 380063 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 121222000000020 its reverse (20000000222121), we get a palindrome (141222000222141).

The spelling of 121222000000020 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, twenty", and thus it is an aban number.