20121130455 has 16 divisors (see below), whose sum is σ = 32195806944. Its totient is φ = 10730603520.

The previous prime is 20121130423. The next prime is 20121130459. The reversal of 20121130455 is 55403112102.

It is a happy number.

It is not a de Polignac number, because 20121130455 - 2⁵ = 20121130423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121130459) 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, 296907 + ... + 358323.

It is an arithmetic number, because the mean of its divisors is an integer number (2012237934).

Almost surely, 2^20121130455 is an apocalyptic number.

20121130455 is a deficient number, since it is larger than the sum of its proper divisors (12074676489).

20121130455 is a wasteful number, since it uses less digits than its factorization.

20121130455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83266.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 20121130455 its reverse (55403112102), we get a palindrome (75524242557).

The spelling of 20121130455 in words is "twenty billion, one hundred twenty-one million, one hundred thirty thousand, four hundred fifty-five".