121410420040 has 128 divisors (see below), whose sum is σ = 340470144000. Its totient is φ = 37937922048.

The previous prime is 121410420031. The next prime is 121410420059. The reversal of 121410420040 is 40024014121.

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, 76456 + ... + 498664.

It is an arithmetic number, because the mean of its divisors is an integer number (2659923000).

Almost surely, 2^121410420040 is an apocalyptic number.

121410420040 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 121410420040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170235072000).

121410420040 is an abundant number, since it is smaller than the sum of its proper divisors (219059723960).

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

121410420040 is a wasteful number, since it uses less digits than its factorization.

121410420040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422319 (or 422315 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 121410420040 its reverse (40024014121), we get a palindrome (161434434161).

The spelling of 121410420040 in words is "one hundred twenty-one billion, four hundred ten million, four hundred twenty thousand, forty".