21223010527552 has 14 divisors (see below), whose sum is σ = 42114411515738. Its totient is φ = 10611505263744.

The previous prime is 21223010527531. The next prime is 21223010527559. The reversal of 21223010527552 is 25572501032212.

It can be written as a sum of positive squares in only one way, i.e., 13367681441856 + 7855329085696 = 3656184^2 + 2802736^2 .

It is a super-2 number, since 2×21223010527552² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223010527559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165804769683 + ... + 165804769810.

Almost surely, 2^{21223010527552} is an apocalyptic number.

It is an amenable number.

21223010527552 is a deficient number, since it is larger than the sum of its proper divisors (20891400988186).

21223010527552 is an equidigital number, since it uses as much as digits as its factorization.

21223010527552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331609539505 (or 331609539495 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 37.

Adding to 21223010527552 its reverse (25572501032212), we get a palindrome (46795511559764).

The spelling of 21223010527552 in words is "twenty-one trillion, two hundred twenty-three billion, ten million, five hundred twenty-seven thousand, five hundred fifty-two".