21400311412 has 12 divisors (see below), whose sum is σ = 37689084580. Its totient is φ = 10632001536.

The previous prime is 21400311389. The next prime is 21400311481. The reversal of 21400311412 is 21411300412.

It can be written as a sum of positive squares in 2 ways, for example, as 9140507236 + 12259804176 = 95606^2 + 110724^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21400311412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17037837 + ... + 17039092.

Almost surely, 2^21400311412 is an apocalyptic number.

It is an amenable number.

21400311412 is a deficient number, since it is larger than the sum of its proper divisors (16288773168).

21400311412 is a wasteful number, since it uses less digits than its factorization.

21400311412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34077090 (or 34077088 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21400311412 its reverse (21411300412), we get a palindrome (42811611824).

The spelling of 21400311412 in words is "twenty-one billion, four hundred million, three hundred eleven thousand, four hundred twelve".