123041020521 has 8 divisors (see below), whose sum is σ = 164067382080. Its totient is φ = 82021002992.

The previous prime is 123041020511. The next prime is 123041020559. The reversal of 123041020521 is 125020140321.

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

It is a cyclic number.

It is not a de Polignac number, because 123041020521 - 2⁷ = 123041020393 is a prime.

It is a super-2 number, since 2×123041020521² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123041020511) 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, 1540566 + ... + 1618463.

It is an arithmetic number, because the mean of its divisors is an integer number (20508422760).

Almost surely, 2^123041020521 is an apocalyptic number.

It is an amenable number.

123041020521 is a deficient number, since it is larger than the sum of its proper divisors (41026361559).

123041020521 is a wasteful number, since it uses less digits than its factorization.

123041020521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172015.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 123041020521 its reverse (125020140321), we get a palindrome (248061160842).

The spelling of 123041020521 in words is "one hundred twenty-three billion, forty-one million, twenty thousand, five hundred twenty-one".