21616230541234 has 12 divisors (see below), whose sum is σ = 37718116556814. Its totient is φ = 9264098803344.

The previous prime is 21616230541229. The next prime is 21616230541237. The reversal of 21616230541234 is 43214503261612.

It can be written as a sum of positive squares in only one way, i.e., 16596278265609 + 5019952275625 = 4073853^2 + 2240525^2 .

It is a super-2 number, since 2×21616230541234² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21616230541237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110286890419 + ... + 110286890614.

Almost surely, 2^{21616230541234} is an apocalyptic number.

21616230541234 is a deficient number, since it is larger than the sum of its proper divisors (16101886015580).

21616230541234 is a wasteful number, since it uses less digits than its factorization.

21616230541234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220573781049 (or 220573781042 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 21616230541234 in words is "twenty-one trillion, six hundred sixteen billion, two hundred thirty million, five hundred forty-one thousand, two hundred thirty-four".