121402655506 has 8 divisors (see below), whose sum is σ = 198658890864. Its totient is φ = 55183025220.

The previous prime is 121402655497. The next prime is 121402655537. The reversal of 121402655506 is 605556204121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2759151240 + ... + 2759151283.

It is an arithmetic number, because the mean of its divisors is an integer number (24832361358).

Almost surely, 2^121402655506 is an apocalyptic number.

121402655506 is a deficient number, since it is larger than the sum of its proper divisors (77256235358).

121402655506 is a wasteful number, since it uses less digits than its factorization.

121402655506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5518302536.

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 121402655506 its reverse (605556204121), we get a palindrome (726958859627).

The spelling of 121402655506 in words is "one hundred twenty-one billion, four hundred two million, six hundred fifty-five thousand, five hundred six".