20121150501 has 24 divisors (see below), whose sum is σ = 30023944704. Its totient is φ = 12971645280.

The previous prime is 20121150457. The next prime is 20121150509. The reversal of 20121150501 is 10505112102.

20121150501 is a `hidden beast` number, since 2 + 0 + 12 + 1 + 150 + 501 = 666.

It is not a de Polignac number, because 20121150501 - 2¹⁵ = 20121117733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121150509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 355015 + ... + 407771.

It is an arithmetic number, because the mean of its divisors is an integer number (1250997696).

Almost surely, 2^20121150501 is an apocalyptic number.

It is an amenable number.

20121150501 is a deficient number, since it is larger than the sum of its proper divisors (9902794203).

20121150501 is a wasteful number, since it uses less digits than its factorization.

20121150501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54161 (or 54158 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

Adding to 20121150501 its reverse (10505112102), we get a palindrome (30626262603).

The spelling of 20121150501 in words is "twenty billion, one hundred twenty-one million, one hundred fifty thousand, five hundred one".