122743435521 has 16 divisors (see below), whose sum is σ = 187698535424. Its totient is φ = 69891261264.

The previous prime is 122743435433. The next prime is 122743435583. The reversal of 122743435521 is 125534347221.

It is not a de Polignac number, because 122743435521 - 2¹³ = 122743427329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122743435521.

It is not an unprimeable number, because it can be changed into a prime (122743436521) 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, 10320781 + ... + 10332666.

It is an arithmetic number, because the mean of its divisors is an integer number (11731158464).

Almost surely, 2^122743435521 is an apocalyptic number.

It is an amenable number.

122743435521 is a deficient number, since it is larger than the sum of its proper divisors (64955099903).

122743435521 is a wasteful number, since it uses less digits than its factorization.

122743435521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20653740.

The product of its digits is 201600, while the sum is 39.

The spelling of 122743435521 in words is "one hundred twenty-two billion, seven hundred forty-three million, four hundred thirty-five thousand, five hundred twenty-one".