2121642532106 has 8 divisors (see below), whose sum is σ = 3292203929220. Its totient is φ = 1024241222368.

The previous prime is 2121642532091. The next prime is 2121642532117. The reversal of 2121642532106 is 6012352461212.

It can be written as a sum of positive squares in 2 ways, for example, as 2120940759025 + 701773081 = 1456345^2 + 26491^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18290021771 + ... + 18290021886.

Almost surely, 2^{2121642532106} is an apocalyptic number.

2121642532106 is a deficient number, since it is larger than the sum of its proper divisors (1170561397114).

2121642532106 is a wasteful number, since it uses less digits than its factorization.

2121642532106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36580043688.

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 2121642532106 its reverse (6012352461212), we get a palindrome (8133994993318).

The spelling of 2121642532106 in words is "two trillion, one hundred twenty-one billion, six hundred forty-two million, five hundred thirty-two thousand, one hundred six".