21140224040212 has 24 divisors (see below), whose sum is σ = 37030051152360. Its totient is φ = 10560210385920.

The previous prime is 21140224040209. The next prime is 21140224040239. The reversal of 21140224040212 is 21204042204112.

It can be written as a sum of positive squares in 4 ways, for example, as 5005573934596 + 16134650105616 = 2237314^2 + 4016796^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97080078 + ... + 97297594.

It is an arithmetic number, because the mean of its divisors is an integer number (1542918798015).

Almost surely, 2^{21140224040212} is an apocalyptic number.

It is an amenable number.

21140224040212 is a deficient number, since it is larger than the sum of its proper divisors (15889827112148).

21140224040212 is a wasteful number, since it uses less digits than its factorization.

21140224040212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240171 (or 240169 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 21140224040212 its reverse (21204042204112), we get a palindrome (42344266244324).

The spelling of 21140224040212 in words is "twenty-one trillion, one hundred forty billion, two hundred twenty-four million, forty thousand, two hundred twelve".