20121131030 has 64 divisors (see below), whose sum is σ = 48628435968. Its totient is φ = 5789093760.

The previous prime is 20121130999. The next prime is 20121131053. The reversal of 20121131030 is 3013112102.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20121130996 and 20121131014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 995042 + ... + 1015061.

It is an arithmetic number, because the mean of its divisors is an integer number (759819312).

Almost surely, 2^20121131030 is an apocalyptic number.

20121131030 is an abundant number, since it is smaller than the sum of its proper divisors (28507304938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121131030 is a wasteful number, since it uses less digits than its factorization.

20121131030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010141.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20121131030 its reverse (3013112102), we get a palindrome (23134243132).

It can be divided in two parts, 20121 and 131030, that added together give a palindrome (151151).

The spelling of 20121131030 in words is "twenty billion, one hundred twenty-one million, one hundred thirty-one thousand, thirty".