121122222120020 has 48 divisors (see below), whose sum is σ = 279598167769536. Its totient is φ = 43708227264000.

The previous prime is 121122222119963. The next prime is 121122222120041. The reversal of 121122222120020 is 20021222221121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121122222119974 and 121122222120001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2101328261 + ... + 2101385900.

It is an arithmetic number, because the mean of its divisors is an integer number (5824961828532).

Almost surely, 2^{121122222120020} is an apocalyptic number.

121122222120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121122222120020 is an abundant number, since it is smaller than the sum of its proper divisors (158475945649516).

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

121122222120020 is a wasteful number, since it uses less digits than its factorization.

121122222120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4202714312 (or 4202714310 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 121122222120020 its reverse (20021222221121), we get a palindrome (141143444341141).

The spelling of 121122222120020 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred twenty thousand, twenty".