123321121011020 has 24 divisors (see below), whose sum is σ = 259068835943568. Its totient is φ = 49310451867200.

The previous prime is 123321121010987. The next prime is 123321121011031. The reversal of 123321121011020 is 20110121123321.

It is a super-2 number, since 2×123321121011020² (a number of 29 digits) contains 22 as substring.

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 = 123321121010983 and 123321121011001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1124727386 + ... + 1124837025.

It is an arithmetic number, because the mean of its divisors is an integer number (10794534830982).

Almost surely, 2^{123321121011020} is an apocalyptic number.

123321121011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123321121011020 is an abundant number, since it is smaller than the sum of its proper divisors (135747714932548).

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

123321121011020 is a wasteful number, since it uses less digits than its factorization.

123321121011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249567161 (or 2249567159 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 123321121011020 its reverse (20110121123321), we get a palindrome (143431242134341).

The spelling of 123321121011020 in words is "one hundred twenty-three trillion, three hundred twenty-one billion, one hundred twenty-one million, eleven thousand, twenty".