20121023541 has 16 divisors (see below), whose sum is σ = 28243353600. Its totient is φ = 12706520688.

The previous prime is 20121023479. The next prime is 20121023551. The reversal of 20121023541 is 14532012102.

It is not a de Polignac number, because 20121023541 - 2⁶ = 20121023477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121023551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 665740 + ... + 695306.

It is an arithmetic number, because the mean of its divisors is an integer number (1765209600).

Almost surely, 2^20121023541 is an apocalyptic number.

It is an amenable number.

20121023541 is a deficient number, since it is larger than the sum of its proper divisors (8122330059).

20121023541 is a wasteful number, since it uses less digits than its factorization.

20121023541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41528.

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

Adding to 20121023541 its reverse (14532012102), we get a palindrome (34653035643).

The spelling of 20121023541 in words is "twenty billion, one hundred twenty-one million, twenty-three thousand, five hundred forty-one".