121430034440 has 128 divisors (see below), whose sum is σ = 321124849920. Its totient is φ = 40741708800.

The previous prime is 121430034433. The next prime is 121430034449. The reversal of 121430034440 is 44430034121.

It is a super-2 number, since 2×121430034440² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (121430034449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21716045 + ... + 21721635.

It is an arithmetic number, because the mean of its divisors is an integer number (2508787890).

Almost surely, 2^121430034440 is an apocalyptic number.

121430034440 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 121430034440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160562424960).

121430034440 is an abundant number, since it is smaller than the sum of its proper divisors (199694815480).

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

121430034440 is a wasteful number, since it uses less digits than its factorization.

121430034440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9423 (or 9419 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 121430034440 its reverse (44430034121), we get a palindrome (165860068561).

The spelling of 121430034440 in words is "one hundred twenty-one billion, four hundred thirty million, thirty-four thousand, four hundred forty".