21111136222704 has 320 divisors, whose sum is σ = 65287851310080. Its totient is φ = 5802596352000.

The previous prime is 21111136222667. The next prime is 21111136222723. The reversal of 21111136222704 is 40722263111112.

It is a super-2 number, since 2×21111136222704² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 140749509 + ... + 140899419.

It is an arithmetic number, because the mean of its divisors is an integer number (204024535344).

Almost surely, 2^{21111136222704} is an apocalyptic number.

21111136222704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21111136222704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32643925655040).

21111136222704 is an abundant number, since it is smaller than the sum of its proper divisors (44176715087376).

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

21111136222704 is a wasteful number, since it uses less digits than its factorization.

21111136222704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150520 (or 150514 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

Adding to 21111136222704 its reverse (40722263111112), we get a palindrome (61833399333816).

The spelling of 21111136222704 in words is "twenty-one trillion, one hundred eleven billion, one hundred thirty-six million, two hundred twenty-two thousand, seven hundred four".