121124210340 has 144 divisors (see below), whose sum is σ = 394641821952. Its totient is φ = 27676905984.

The previous prime is 121124210323. The next prime is 121124210351. The reversal of 121124210340 is 43012421121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18480504 + ... + 18487056.

It is an arithmetic number, because the mean of its divisors is an integer number (2740568208).

Almost surely, 2^121124210340 is an apocalyptic number.

121124210340 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 121124210340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197320910976).

121124210340 is an abundant number, since it is smaller than the sum of its proper divisors (273517611612).

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

121124210340 is a wasteful number, since it uses less digits than its factorization.

121124210340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12866 (or 12857 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 121124210340 its reverse (43012421121), we get a palindrome (164136631461).

The spelling of 121124210340 in words is "one hundred twenty-one billion, one hundred twenty-four million, two hundred ten thousand, three hundred forty".