121223023020 has 288 divisors, whose sum is σ = 425227682880. Its totient is φ = 27626618880.

The previous prime is 121223022971. The next prime is 121223023049. The reversal of 121223023020 is 20320322121.

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 = 121223022984 and 121223023002.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 40828096 + ... + 40831064.

It is an arithmetic number, because the mean of its divisors is an integer number (1476485010).

Almost surely, 2^121223023020 is an apocalyptic number.

121223023020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121223023020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212613841440).

121223023020 is an abundant number, since it is smaller than the sum of its proper divisors (304004659860).

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

121223023020 is a wasteful number, since it uses less digits than its factorization.

121223023020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4225 (or 4220 counting only the distinct ones).

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

Adding to 121223023020 its reverse (20320322121), we get a palindrome (141543345141).

The spelling of 121223023020 in words is "one hundred twenty-one billion, two hundred twenty-three million, twenty-three thousand, twenty".