121509464622 has 128 divisors (see below), whose sum is σ = 321034420224. Its totient is φ = 29748031488.

The previous prime is 121509464581. The next prime is 121509464641. The reversal of 121509464622 is 226464905121.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 63 ways as a sum of consecutive naturals, for example, 587923 + ... + 767249.

It is an arithmetic number, because the mean of its divisors is an integer number (2508081408).

Almost surely, 2^121509464622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121509464622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160517210112).

121509464622 is an abundant number, since it is smaller than the sum of its proper divisors (199524955602).

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

121509464622 is a wasteful number, since it uses less digits than its factorization.

121509464622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179442.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 121509464622 in words is "one hundred twenty-one billion, five hundred nine million, four hundred sixty-four thousand, six hundred twenty-two".