21611131650742 has 16 divisors (see below), whose sum is σ = 34916393856960. Its totient is φ = 9998785512072.

The previous prime is 21611131650739. The next prime is 21611131650751. The reversal of 21611131650742 is 24705613111612.

It is a super-2 number, since 2×21611131650742² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21611131650695 and 21611131650704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6612951748 + ... + 6612955015.

It is an arithmetic number, because the mean of its divisors is an integer number (2182274616060).

Almost surely, 2^{21611131650742} is an apocalyptic number.

21611131650742 is a deficient number, since it is larger than the sum of its proper divisors (13305262206218).

21611131650742 is a wasteful number, since it uses less digits than its factorization.

21611131650742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13225906827.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 21611131650742 in words is "twenty-one trillion, six hundred eleven billion, one hundred thirty-one million, six hundred fifty thousand, seven hundred forty-two".