121123212020 has 24 divisors (see below), whose sum is σ = 254405911200. Its totient is φ = 48440300832.

The previous prime is 121123212017. The next prime is 121123212029. The reversal of 121123212020 is 20212321121.

It is a self number, because there is not a number n which added to its sum of digits gives 121123212020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121123212029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450410 + ... + 667169.

It is an arithmetic number, because the mean of its divisors is an integer number (10600246300).

Almost surely, 2^121123212020 is an apocalyptic number.

121123212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121123212020 is an abundant number, since it is smaller than the sum of its proper divisors (133282699180).

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

121123212020 is a wasteful number, since it uses less digits than its factorization.

121123212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123007 (or 1123005 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 121123212020 its reverse (20212321121), we get a palindrome (141335533141).

The spelling of 121123212020 in words is "one hundred twenty-one billion, one hundred twenty-three million, two hundred twelve thousand, twenty".