1321010444421 has 12 divisors (see below), whose sum is σ = 1931115670848. Its totient is φ = 870063103464.

The previous prime is 1321010444387. The next prime is 1321010444449. The reversal of 1321010444421 is 1244440101231.

1321010444421 is a `hidden beast` number, since 1 + 3 + 210 + 1 + 0 + 4 + 4 + 442 + 1 = 666.

It is not a de Polignac number, because 1321010444421 - 2¹⁰ = 1321010443397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321010444521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 884209725 + ... + 884211218.

It is an arithmetic number, because the mean of its divisors is an integer number (160926305904).

Almost surely, 2^{1321010444421} is an apocalyptic number.

It is an amenable number.

1321010444421 is a deficient number, since it is larger than the sum of its proper divisors (610105226427).

1321010444421 is a wasteful number, since it uses less digits than its factorization.

1321010444421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768421032 (or 1768421029 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 1321010444421 its reverse (1244440101231), we get a palindrome (2565450545652).

The spelling of 1321010444421 in words is "one trillion, three hundred twenty-one billion, ten million, four hundred forty-four thousand, four hundred twenty-one".