12721227046 has 16 divisors (see below), whose sum is σ = 20829548880. Its totient is φ = 5778766080.

The previous prime is 12721227017. The next prime is 12721227049. The reversal of 12721227046 is 64072212721.

It is a super-2 number, since 2×12721227046² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12721227049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144291 + ... + 215086.

It is an arithmetic number, because the mean of its divisors is an integer number (1301846805).

Almost surely, 2^12721227046 is an apocalyptic number.

12721227046 is a deficient number, since it is larger than the sum of its proper divisors (8108321834).

12721227046 is a wasteful number, since it uses less digits than its factorization.

12721227046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360999.

The product of its (nonzero) digits is 18816, while the sum is 34.

Adding to 12721227046 its reverse (64072212721), we get a palindrome (76793439767).

The spelling of 12721227046 in words is "twelve billion, seven hundred twenty-one million, two hundred twenty-seven thousand, forty-six".