21601630412602 has 16 divisors (see below), whose sum is σ = 32532950020032. Its totient is φ = 10757332177120.

The previous prime is 21601630412561. The next prime is 21601630412603. The reversal of 21601630412602 is 20621403610612.

It is not an unprimeable number, because it can be changed into a prime (21601630412603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2262724 + ... + 6951487.

It is an arithmetic number, because the mean of its divisors is an integer number (2033309376252).

Almost surely, 2^{21601630412602} is an apocalyptic number.

21601630412602 is a deficient number, since it is larger than the sum of its proper divisors (10931319607430).

21601630412602 is a wasteful number, since it uses less digits than its factorization.

21601630412602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9218933.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 21601630412602 in words is "twenty-one trillion, six hundred one billion, six hundred thirty million, four hundred twelve thousand, six hundred two".