1131210021321 has 24 divisors (see below), whose sum is σ = 1654903882944. Its totient is φ = 744521277600.

The previous prime is 1131210021299. The next prime is 1131210021329. The reversal of 1131210021321 is 1231200121311.

1131210021321 is a `hidden beast` number, since 1 + 1 + 312 + 10 + 0 + 21 + 321 = 666.

It is not a de Polignac number, because 1131210021321 - 2²³ = 1131201632713 is a prime.

It is a super-2 number, since 2×1131210021321² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1131210021294 and 1131210021303.

It is not an unprimeable number, because it can be changed into a prime (1131210021329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1477741 + ... + 2108586.

It is an arithmetic number, because the mean of its divisors is an integer number (68954328456).

Almost surely, 2^{1131210021321} is an apocalyptic number.

It is an amenable number.

1131210021321 is a deficient number, since it is larger than the sum of its proper divisors (523693861623).

1131210021321 is a wasteful number, since it uses less digits than its factorization.

1131210021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3586781 (or 3586778 counting only the distinct ones).

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

Adding to 1131210021321 its reverse (1231200121311), we get a palindrome (2362410142632).

The spelling of 1131210021321 in words is "one trillion, one hundred thirty-one billion, two hundred ten million, twenty-one thousand, three hundred twenty-one".