1321221040012 has 24 divisors (see below), whose sum is σ = 2428642444032. Its totient is φ = 627703626000.

The previous prime is 1321221039997. The next prime is 1321221040067. The reversal of 1321221040012 is 2100401221231.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47539414 + ... + 47567197.

It is an arithmetic number, because the mean of its divisors is an integer number (101193435168).

Almost surely, 2^{1321221040012} is an apocalyptic number.

It is an amenable number.

1321221040012 is a deficient number, since it is larger than the sum of its proper divisors (1107421404020).

1321221040012 is a wasteful number, since it uses less digits than its factorization.

1321221040012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95106789 (or 95106787 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1321221040012 its reverse (2100401221231), we get a palindrome (3421622261243).

The spelling of 1321221040012 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-one million, forty thousand, twelve".