121423142344 has 64 divisors (see below), whose sum is σ = 266387552640. Its totient is φ = 50800780800.

The previous prime is 121423142339. The next prime is 121423142359. The reversal of 121423142344 is 443241324121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4786494 + ... + 4811794.

It is an arithmetic number, because the mean of its divisors is an integer number (4162305510).

Almost surely, 2^121423142344 is an apocalyptic number.

121423142344 is a gapful number since it is divisible by the number (14) 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 121423142344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133193776320).

121423142344 is an abundant number, since it is smaller than the sum of its proper divisors (144964410296).

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

121423142344 is a wasteful number, since it uses less digits than its factorization.

121423142344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27350 (or 27346 counting only the distinct ones).

The product of its digits is 18432, while the sum is 31.

Adding to 121423142344 its reverse (443241324121), we get a palindrome (564664466465).

The spelling of 121423142344 in words is "one hundred twenty-one billion, four hundred twenty-three million, one hundred forty-two thousand, three hundred forty-four".