121222122221020 has 12 divisors (see below), whose sum is σ = 254566456664184. Its totient is φ = 48488848888400.

The previous prime is 121222122220987. The next prime is 121222122221033. The reversal of 121222122221020 is 20122221222121.

It is a junction number, because it is equal to n+sod(n) for n = 121222122220982 and 121222122221000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030553055506 + ... + 3030553055545.

It is an arithmetic number, because the mean of its divisors is an integer number (21213871388682).

Almost surely, 2^{121222122221020} is an apocalyptic number.

121222122221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121222122221020 is an abundant number, since it is smaller than the sum of its proper divisors (133344334443164).

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

121222122221020 is a wasteful number, since it uses less digits than its factorization.

121222122221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6061106111060 (or 6061106111058 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 121222122221020 its reverse (20122221222121), we get a palindrome (141344343443141).

The spelling of 121222122221020 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty".