121402655655 has 8 divisors (see below), whose sum is σ = 194244249072. Its totient is φ = 64748083008.

The previous prime is 121402655623. The next prime is 121402655677. The reversal of 121402655655 is 556556204121.

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

It is not a de Polignac number, because 121402655655 - 2⁵ = 121402655623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4046755174 + ... + 4046755203.

It is an arithmetic number, because the mean of its divisors is an integer number (24280531134).

Almost surely, 2^121402655655 is an apocalyptic number.

121402655655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121402655655 is a deficient number, since it is larger than the sum of its proper divisors (72841593417).

121402655655 is an equidigital number, since it uses as much as digits as its factorization.

121402655655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8093510385.

The product of its (nonzero) digits is 360000, while the sum is 42.

Adding to 121402655655 its reverse (556556204121), we get a palindrome (677958859776).

The spelling of 121402655655 in words is "one hundred twenty-one billion, four hundred two million, six hundred fifty-five thousand, six hundred fifty-five".