121505400033402 has 96 divisors (see below), whose sum is σ = 308516177548800. Its totient is φ = 31546395306720.

The previous prime is 121505400033397. The next prime is 121505400033419. The reversal of 121505400033402 is 204330004505121.

It is a self number, because there is not a number n which added to its sum of digits gives 121505400033402.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 413902 + ... + 15594297.

It is an arithmetic number, because the mean of its divisors is an integer number (3213710182800).

Almost surely, 2^{121505400033402} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121505400033402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154258088774400).

121505400033402 is an abundant number, since it is smaller than the sum of its proper divisors (187010777515398).

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

121505400033402 is a wasteful number, since it uses less digits than its factorization.

121505400033402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16010576 (or 16010569 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 121505400033402 its reverse (204330004505121), we get a palindrome (325835404538523).

The spelling of 121505400033402 in words is "one hundred twenty-one trillion, five hundred five billion, four hundred million, thirty-three thousand, four hundred two".