20120331012 has 24 divisors (see below), whose sum is σ = 47717070912. Its totient is φ = 6596829600.

The previous prime is 20120330983. The next prime is 20120331013. The reversal of 20120331012 is 21013302102.

It is a junction number, because it is equal to n+sod(n) for n = 20120330982 and 20120331000.

It is not an unprimeable number, because it can be changed into a prime (20120331013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13742664 + ... + 13744127.

It is an arithmetic number, because the mean of its divisors is an integer number (1988211288).

Almost surely, 2^20120331012 is an apocalyptic number.

It is an amenable number.

20120331012 is an abundant number, since it is smaller than the sum of its proper divisors (27596739900).

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

20120331012 is a wasteful number, since it uses less digits than its factorization.

20120331012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27486859 (or 27486857 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20120331012 its reverse (21013302102), we get a palindrome (41133633114).

The spelling of 20120331012 in words is "twenty billion, one hundred twenty million, three hundred thirty-one thousand, twelve".