21031314234412 has 48 divisors (see below), whose sum is σ = 39110880140640. Its totient is φ = 9861318374400.

The previous prime is 21031314234389. The next prime is 21031314234421. The reversal of 21031314234412 is 21443241313012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21176014 + ... + 22146922.

It is an arithmetic number, because the mean of its divisors is an integer number (814810002930).

Almost surely, 2^{21031314234412} is an apocalyptic number.

It is an amenable number.

21031314234412 is a deficient number, since it is larger than the sum of its proper divisors (18079565906228).

21031314234412 is a wasteful number, since it uses less digits than its factorization.

21031314234412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972082 (or 972080 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 21031314234412 its reverse (21443241313012), we get a palindrome (42474555547424).

The spelling of 21031314234412 in words is "twenty-one trillion, thirty-one billion, three hundred fourteen million, two hundred thirty-four thousand, four hundred twelve".