121402005620 has 24 divisors (see below), whose sum is σ = 291364813824. Its totient is φ = 41623544736.

The previous prime is 121402005583. The next prime is 121402005643. The reversal of 121402005620 is 26500204121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 433578452 + ... + 433578731.

It is an arithmetic number, because the mean of its divisors is an integer number (12140200576).

Almost surely, 2^121402005620 is an apocalyptic number.

121402005620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121402005620 is an abundant number, since it is smaller than the sum of its proper divisors (169962808204).

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

121402005620 is a wasteful number, since it uses less digits than its factorization.

121402005620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867157199 (or 867157197 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 121402005620 its reverse (26500204121), we get a palindrome (147902209741).

The spelling of 121402005620 in words is "one hundred twenty-one billion, four hundred two million, five thousand, six hundred twenty".