1321021231011 has 48 divisors (see below), whose sum is σ = 1990474982496. Its totient is φ = 843495464448.

The previous prime is 1321021230973. The next prime is 1321021231037. The reversal of 1321021231011 is 1101321201231.

1321021231011 is a `hidden beast` number, since 1 + 321 + 0 + 21 + 2 + 310 + 11 = 666.

It is not a de Polignac number, because 1321021231011 - 2⁹ = 1321021230499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321021231111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38481991 + ... + 38516303.

It is an arithmetic number, because the mean of its divisors is an integer number (41468228802).

Almost surely, 2^{1321021231011} is an apocalyptic number.

1321021231011 is a deficient number, since it is larger than the sum of its proper divisors (669453751485).

1321021231011 is a wasteful number, since it uses less digits than its factorization.

1321021231011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36292 (or 36289 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1321021231011 its reverse (1101321201231), we get a palindrome (2422342432242).

The spelling of 1321021231011 in words is "one trillion, three hundred twenty-one billion, twenty-one million, two hundred thirty-one thousand, eleven".