22611221072 has 20 divisors (see below), whose sum is σ = 47791899456. Its totient is φ = 10277827680.

The previous prime is 22611221063. The next prime is 22611221107. The reversal of 22611221072 is 27012211622.

It is a super-2 number, since 2×22611221072² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64236248 + ... + 64236599.

Almost surely, 2^22611221072 is an apocalyptic number.

22611221072 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22611221072 is an abundant number, since it is smaller than the sum of its proper divisors (25180678384).

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

22611221072 is a wasteful number, since it uses less digits than its factorization.

22611221072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128472866 (or 128472860 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

Adding to 22611221072 its reverse (27012211622), we get a palindrome (49623432694).

The spelling of 22611221072 in words is "twenty-two billion, six hundred eleven million, two hundred twenty-one thousand, seventy-two".