121423210320 has 160 divisors (see below), whose sum is σ = 404654100480. Its totient is φ = 30022617600.

The previous prime is 121423210313. The next prime is 121423210361. The reversal of 121423210320 is 23012324121.

It is a super-4 number, since 4×121423210320⁴ (a number of 45 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68956 + ... + 497595.

It is an arithmetic number, because the mean of its divisors is an integer number (2529088128).

Almost surely, 2^121423210320 is an apocalyptic number.

121423210320 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 121423210320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202327050240).

121423210320 is an abundant number, since it is smaller than the sum of its proper divisors (283230890160).

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

121423210320 is a wasteful number, since it uses less digits than its factorization.

121423210320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566633 (or 566627 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 121423210320 its reverse (23012324121), we get a palindrome (144435534441).

The spelling of 121423210320 in words is "one hundred twenty-one billion, four hundred twenty-three million, two hundred ten thousand, three hundred twenty".