125534441221 has 16 divisors (see below), whose sum is σ = 144280781568. Its totient is φ = 106992835200.

The previous prime is 125534441203. The next prime is 125534441237. The reversal of 125534441221 is 122144435521.

It is a cyclic number.

It is not a de Polignac number, because 125534441221 - 2¹⁹ = 125533916933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125534441251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 932961 + ... + 1059001.

It is an arithmetic number, because the mean of its divisors is an integer number (9017548848).

Almost surely, 2^125534441221 is an apocalyptic number.

It is an amenable number.

125534441221 is a deficient number, since it is larger than the sum of its proper divisors (18746340347).

125534441221 is a wasteful number, since it uses less digits than its factorization.

125534441221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126852.

The product of its digits is 38400, while the sum is 34.

Adding to 125534441221 its reverse (122144435521), we get a palindrome (247678876742).

The spelling of 125534441221 in words is "one hundred twenty-five billion, five hundred thirty-four million, four hundred forty-one thousand, two hundred twenty-one".