21261603614106 has 32 divisors (see below), whose sum is σ = 43990315971840. Its totient is φ = 6842691872576.

The previous prime is 21261603614101. The next prime is 21261603614137. The reversal of 21261603614106 is 60141630616212.

It is not an unprimeable number, because it can be changed into a prime (21261603614101) 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 15 ways as a sum of consecutive naturals, for example, 8860975 + ... + 11001821.

It is an arithmetic number, because the mean of its divisors is an integer number (1374697374120).

Almost surely, 2^{21261603614106} is an apocalyptic number.

21261603614106 is an abundant number, since it is smaller than the sum of its proper divisors (22728712357734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21261603614106 is a wasteful number, since it uses less digits than its factorization.

21261603614106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197958.

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 21261603614106 in words is "twenty-one trillion, two hundred sixty-one billion, six hundred three million, six hundred fourteen thousand, one hundred six".