21013210213012 has 12 divisors (see below), whose sum is σ = 36826958460096. Its totient is φ = 10491222081560.

The previous prime is 21013210213007. The next prime is 21013210213013. The reversal of 21013210213012 is 21031201231012.

It is a super-2 number, since 2×21013210213012² (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 (21013210213013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3845753164 + ... + 3845758627.

It is an arithmetic number, because the mean of its divisors is an integer number (3068913205008).

Almost surely, 2^{21013210213012} is an apocalyptic number.

It is an amenable number.

21013210213012 is a deficient number, since it is larger than the sum of its proper divisors (15813748247084).

21013210213012 is a wasteful number, since it uses less digits than its factorization.

21013210213012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7691512478 (or 7691512476 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21013210213012 its reverse (21031201231012), we get a palindrome (42044411444024).

The spelling of 21013210213012 in words is "twenty-one trillion, thirteen billion, two hundred ten million, two hundred thirteen thousand, twelve".