21311773326126 has 48 divisors (see below), whose sum is σ = 46630070803680. Its totient is φ = 7034010347520.

The previous prime is 21311773326121. The next prime is 21311773326157. The reversal of 21311773326126 is 62162337711312.

21311773326126 is a `hidden beast` number, since 2 + 1 + 31 + 177 + 3 + 326 + 126 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311773326121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13117146 + ... + 14652066.

It is an arithmetic number, because the mean of its divisors is an integer number (971459808410).

Almost surely, 2^{21311773326126} is an apocalyptic number.

21311773326126 is an abundant number, since it is smaller than the sum of its proper divisors (25318297477554).

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

21311773326126 is a wasteful number, since it uses less digits than its factorization.

21311773326126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542521 (or 1542518 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The spelling of 21311773326126 in words is "twenty-one trillion, three hundred eleven billion, seven hundred seventy-three million, three hundred twenty-six thousand, one hundred twenty-six".