121664354434 has 16 divisors (see below), whose sum is σ = 208599478848. Its totient is φ = 52133862672.

The previous prime is 121664354431. The next prime is 121664354509. The reversal of 121664354434 is 434453466121.

It is not an unprimeable number, because it can be changed into a prime (121664354431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 572029 + ... + 755344.

It is an arithmetic number, because the mean of its divisors is an integer number (13037467428).

Almost surely, 2^121664354434 is an apocalyptic number.

121664354434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

121664354434 is a deficient number, since it is larger than the sum of its proper divisors (86935124414).

121664354434 is a wasteful number, since it uses less digits than its factorization.

121664354434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333929.

The product of its digits is 829440, while the sum is 43.

The spelling of 121664354434 in words is "one hundred twenty-one billion, six hundred sixty-four million, three hundred fifty-four thousand, four hundred thirty-four".