2311212021321 has 32 divisors (see below), whose sum is σ = 3790145772288. Its totient is φ = 1222627645440.

The previous prime is 2311212021281. The next prime is 2311212021367. The reversal of 2311212021321 is 1231202121132.

2311212021321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2311212021321 - 2⁷ = 2311212021193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2311212021721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53043660 + ... + 53087213.

It is an arithmetic number, because the mean of its divisors is an integer number (118442055384).

Almost surely, 2^{2311212021321} is an apocalyptic number.

2311212021321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2311212021321 is a deficient number, since it is larger than the sum of its proper divisors (1478933750967).

2311212021321 is a wasteful number, since it uses less digits than its factorization.

2311212021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106130961.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 2311212021321 its reverse (1231202121132), we get a palindrome (3542414142453).

The spelling of 2311212021321 in words is "two trillion, three hundred eleven billion, two hundred twelve million, twenty-one thousand, three hundred twenty-one".