21312204301412 has 6 divisors (see below), whose sum is σ = 37296357527478. Its totient is φ = 10656102150704.

The previous prime is 21312204301411. The next prime is 21312204301433. The reversal of 21312204301412 is 21410340221312.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15145842598756 + 6166361702656 = 3891766^2 + 2483216^2 .

It is not an unprimeable number, because it can be changed into a prime (21312204301411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2664025537673 + ... + 2664025537680.

It is an arithmetic number, because the mean of its divisors is an integer number (6216059587913).

Almost surely, 2^{21312204301412} is an apocalyptic number.

It is an amenable number.

21312204301412 is a deficient number, since it is larger than the sum of its proper divisors (15984153226066).

21312204301412 is a wasteful number, since it uses less digits than its factorization.

21312204301412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5328051075357 (or 5328051075355 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21312204301412 its reverse (21410340221312), we get a palindrome (42722544522724).

The spelling of 21312204301412 in words is "twenty-one trillion, three hundred twelve billion, two hundred four million, three hundred one thousand, four hundred twelve".