121664250834 has 16 divisors (see below), whose sum is σ = 278089716288. Its totient is φ = 34761214512.

The previous prime is 121664250823. The next prime is 121664250853. The reversal of 121664250834 is 438052466121.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 2896767877 = 121664250834 / (1 + 2 + 1 + 6 + 6 + 4 + 2 + 5 + 0 + 8 + 3 + 4).

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, 1448383897 + ... + 1448383980.

It is an arithmetic number, because the mean of its divisors is an integer number (17380607268).

Almost surely, 2^121664250834 is an apocalyptic number.

121664250834 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

121664250834 is an abundant number, since it is smaller than the sum of its proper divisors (156425465454).

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

121664250834 is a wasteful number, since it uses less digits than its factorization.

121664250834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2896767889.

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 121664250834 in words is "one hundred twenty-one billion, six hundred sixty-four million, two hundred fifty thousand, eight hundred thirty-four".