21530400411112 has 8 divisors (see below), whose sum is σ = 40369500770850. Its totient is φ = 10765200205552.

The previous prime is 21530400411071. The next prime is 21530400411139. The reversal of 21530400411112 is 21111400403512.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18832180235236 + 2698220175876 = 4339606^2 + 1642626^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21530400411112² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345650025687 + ... + 1345650025702.

Almost surely, 2^{21530400411112} is an apocalyptic number.

It is an amenable number.

21530400411112 is a deficient number, since it is larger than the sum of its proper divisors (18839100359738).

21530400411112 is a wasteful number, since it uses less digits than its factorization.

21530400411112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691300051395 (or 2691300051391 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 21530400411112 its reverse (21111400403512), we get a palindrome (42641800814624).

The spelling of 21530400411112 in words is "twenty-one trillion, five hundred thirty billion, four hundred million, four hundred eleven thousand, one hundred twelve".