11312322021 has 96 divisors (see below), whose sum is σ = 22532659968. Its totient is φ = 5277726720.

The previous prime is 11312321987. The next prime is 11312322029. The reversal of 11312322021 is 12022321311.

11312322021 is a `hidden beast` number, since 11 + 312 + 322 + 0 + 21 = 666.

It is not a de Polignac number, because 11312322021 - 2⁶ = 11312321957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11312321985 and 11312322003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312322029) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 316365 + ... + 350301.

It is an arithmetic number, because the mean of its divisors is an integer number (234715208).

Almost surely, 2^11312322021 is an apocalyptic number.

11312322021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11312322021 is a deficient number, since it is larger than the sum of its proper divisors (11220337947).

11312322021 is a wasteful number, since it uses less digits than its factorization.

11312322021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34011 (or 34008 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11312322021 its reverse (12022321311), we get a palindrome (23334643332).

It can be divided in two parts, 11312 and 322021, that added together give a palindrome (333333).

The spelling of 11312322021 in words is "eleven billion, three hundred twelve million, three hundred twenty-two thousand, twenty-one".