121435520066 has 64 divisors (see below), whose sum is σ = 216130548480. Its totient is φ = 50094858240.

The previous prime is 121435520057. The next prime is 121435520069. The reversal of 121435520066 is 660025534121.

It is not an unprimeable number, because it can be changed into a prime (121435520069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14068640 + ... + 14077268.

It is an arithmetic number, because the mean of its divisors is an integer number (3377039820).

Almost surely, 2^121435520066 is an apocalyptic number.

121435520066 is a deficient number, since it is larger than the sum of its proper divisors (94695028414).

121435520066 is a wasteful number, since it uses less digits than its factorization.

121435520066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9019.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 121435520066 in words is "one hundred twenty-one billion, four hundred thirty-five million, five hundred twenty thousand, sixty-six".