1321101001012 has 24 divisors (see below), whose sum is σ = 2495976206472. Its totient is φ = 608218368000.

The previous prime is 1321101001009. The next prime is 1321101001019. The reversal of 1321101001012 is 2101001011231.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 762069637156 + 559031363856 = 872966^2 + 747684^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 1321101000983 and 1321101001001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321101001019) 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, 31657189 + ... + 31698892.

It is an arithmetic number, because the mean of its divisors is an integer number (103999008603).

Almost surely, 2^{1321101001012} is an apocalyptic number.

It is an amenable number.

1321101001012 is a deficient number, since it is larger than the sum of its proper divisors (1174875205460).

1321101001012 is a wasteful number, since it uses less digits than its factorization.

1321101001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63356499 (or 63356497 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 1321101001012 its reverse (2101001011231), we get a palindrome (3422102012243).

The spelling of 1321101001012 in words is "one trillion, three hundred twenty-one billion, one hundred one million, one thousand, twelve".