121240101420 has 108 divisors (see below), whose sum is σ = 371237097504. Its totient is φ = 32027993280.

The previous prime is 121240101413. The next prime is 121240101421. The reversal of 121240101420 is 24101042121.

121240101420 is a `hidden beast` number, since 1 + 2 + 1 + 240 + 1 + 0 + 1 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121240101393 and 121240101402.

It is not an unprimeable number, because it can be changed into a prime (121240101421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2031405 + ... + 2090235.

Almost surely, 2^121240101420 is an apocalyptic number.

121240101420 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 121240101420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185618548752).

121240101420 is an abundant number, since it is smaller than the sum of its proper divisors (249996996084).

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

121240101420 is a wasteful number, since it uses less digits than its factorization.

121240101420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59060 (or 58948 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121240101420 its reverse (24101042121), we get a palindrome (145341143541).

The spelling of 121240101420 in words is "one hundred twenty-one billion, two hundred forty million, one hundred one thousand, four hundred twenty".