121406202420 has 96 divisors (see below), whose sum is σ = 357306985728. Its totient is φ = 30741292032.

The previous prime is 121406202377. The next prime is 121406202427. The reversal of 121406202420 is 24202604121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121406202427) 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 31 ways as a sum of consecutive naturals, for example, 132019 + ... + 510138.

It is an arithmetic number, because the mean of its divisors is an integer number (3721947768).

Almost surely, 2^121406202420 is an apocalyptic number.

121406202420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121406202420 is an abundant number, since it is smaller than the sum of its proper divisors (235900783308).

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

121406202420 is a wasteful number, since it uses less digits than its factorization.

121406202420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642329 (or 642327 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 121406202420 its reverse (24202604121), we get a palindrome (145608806541).

The spelling of 121406202420 in words is "one hundred twenty-one billion, four hundred six million, two hundred two thousand, four hundred twenty".