2311021212 has 12 divisors (see below), whose sum is σ = 5392382856. Its totient is φ = 770340400.

The previous prime is 2311021189. The next prime is 2311021231. The reversal of 2311021212 is 2121201132.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 2311021191 and 2311021200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96292539 + ... + 96292562.

It is an arithmetic number, because the mean of its divisors is an integer number (449365238).

Almost surely, 2^2311021212 is an apocalyptic number.

It is an amenable number.

2311021212 is an abundant number, since it is smaller than the sum of its proper divisors (3081361644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2311021212 is a wasteful number, since it uses less digits than its factorization.

2311021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192585108 (or 192585106 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2311021212 is about 48073.0819898205. The cubic root of 2311021212 is about 1322.1111785609. Note that the first 4 decimals are identical.

Adding to 2311021212 its reverse (2121201132), we get a palindrome (4432222344).

The spelling of 2311021212 in words is "two billion, three hundred eleven million, twenty-one thousand, two hundred twelve".