121166533402 has 4 divisors (see below), whose sum is σ = 181749800106. Its totient is φ = 60583266700.

The previous prime is 121166533357. The next prime is 121166533409. The reversal of 121166533402 is 204335661121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 82816752841 + 38349780561 = 287779^2 + 195831^2 .

It is not an unprimeable number, because it can be changed into a prime (121166533409) by changing a digit.

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 as a sum of consecutive naturals, namely, 30291633349 + ... + 30291633352.

Almost surely, 2^121166533402 is an apocalyptic number.

121166533402 is a deficient number, since it is larger than the sum of its proper divisors (60583266704).

121166533402 is an equidigital number, since it uses as much as digits as its factorization.

121166533402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60583266703.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 121166533402 in words is "one hundred twenty-one billion, one hundred sixty-six million, five hundred thirty-three thousand, four hundred two".