121233202020 has 108 divisors (see below), whose sum is σ = 427780043964. Its totient is φ = 27710444160.

The previous prime is 121233202003. The next prime is 121233202021. The reversal of 121233202020 is 20202332121.

121233202020 is a `hidden beast` number, since 121 + 23 + 320 + 202 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 64161903204 + 57071298816 = 253302^2 + 238896^2 .

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 = 121233201984 and 121233202002.

It is not an unprimeable number, because it can be changed into a prime (121233202021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6863811 + ... + 6881450.

It is an arithmetic number, because the mean of its divisors is an integer number (3960926333).

Almost surely, 2^121233202020 is an apocalyptic number.

121233202020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121233202020 is an abundant number, since it is smaller than the sum of its proper divisors (306546841944).

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

121233202020 is a wasteful number, since it uses less digits than its factorization.

121233202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13745290 (or 13745278 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 121233202020 its reverse (20202332121), we get a palindrome (141435534141).

The spelling of 121233202020 in words is "one hundred twenty-one billion, two hundred thirty-three million, two hundred two thousand, twenty".