126164221013 has 8 divisors (see below), whose sum is σ = 127909805400. Its totient is φ = 124425925888.

The previous prime is 126164220979. The next prime is 126164221019. The reversal of 126164221013 is 310122461621.

It can be written as a sum of positive squares in 4 ways, for example, as 7481904004 + 118682317009 = 86498^2 + 344503^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 126164221013 - 2²⁰ = 126163172437 is a prime.

It is a super-2 number, since 2×126164221013² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126164221019) 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, 1787456 + ... + 1856697.

It is an arithmetic number, because the mean of its divisors is an integer number (15988725675).

Almost surely, 2^126164221013 is an apocalyptic number.

It is an amenable number.

126164221013 is a deficient number, since it is larger than the sum of its proper divisors (1745584387).

126164221013 is an equidigital number, since it uses as much as digits as its factorization.

126164221013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3644631.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 126164221013 its reverse (310122461621), we get a palindrome (436286682634).

The spelling of 126164221013 in words is "one hundred twenty-six billion, one hundred sixty-four million, two hundred twenty-one thousand, thirteen".