1021431210112 has 64 divisors (see below), whose sum is σ = 2064011371200. Its totient is φ = 503408102400.

The previous prime is 1021431210103. The next prime is 1021431210113. The reversal of 1021431210112 is 2110121341201.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 1021431210112.

It is not an unprimeable number, because it can be changed into a prime (1021431210113) 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, 51419062 + ... + 51438922.

It is an arithmetic number, because the mean of its divisors is an integer number (32250177675).

Almost surely, 2^{1021431210112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021431210112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1032005685600).

1021431210112 is an abundant number, since it is smaller than the sum of its proper divisors (1042580161088).

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

1021431210112 is an equidigital number, since it uses as much as digits as its factorization.

1021431210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25605 (or 25593 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1021431210112 its reverse (2110121341201), we get a palindrome (3131552551313).

The spelling of 1021431210112 in words is "one trillion, twenty-one billion, four hundred thirty-one million, two hundred ten thousand, one hundred twelve".