20121012526 has 4 divisors (see below), whose sum is σ = 30181518792. Its totient is φ = 10060506262.

The previous prime is 20121012511. The next prime is 20121012529. The reversal of 20121012526 is 62521012102.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 20121012497 and 20121012506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121012529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5030253130 + ... + 5030253133.

It is an arithmetic number, because the mean of its divisors is an integer number (7545379698).

Almost surely, 2^20121012526 is an apocalyptic number.

20121012526 is a deficient number, since it is larger than the sum of its proper divisors (10060506266).

20121012526 is a wasteful number, since it uses less digits than its factorization.

20121012526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10060506265.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 20121012526 its reverse (62521012102), we get a palindrome (82642024628).

The spelling of 20121012526 in words is "twenty billion, one hundred twenty-one million, twelve thousand, five hundred twenty-six".