2231220212 has 24 divisors (see below), whose sum is σ = 4349994600. Its totient is φ = 994283136.

The previous prime is 2231220137. The next prime is 2231220247. The reversal of 2231220212 is 2120221322.

It can be written as a sum of positive squares in 4 ways, for example, as 618715876 + 1612504336 = 24874^2 + 40156^2 .

It is a super-3 number, since 3×2231220212³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 738287 + ... + 741302.

It is an arithmetic number, because the mean of its divisors is an integer number (181249775).

Almost surely, 2^2231220212 is an apocalyptic number.

It is an amenable number.

2231220212 is a deficient number, since it is larger than the sum of its proper divisors (2118774388).

2231220212 is a wasteful number, since it uses less digits than its factorization.

2231220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479635 (or 1479633 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2231220212 is about 47235.7937585471. The cubic root of 2231220212 is about 1306.7148054538.

Adding to 2231220212 its reverse (2120221322), we get a palindrome (4351441534).

It can be divided in two parts, 22312 and 20212, that added together give a palindrome (42524).

The spelling of 2231220212 in words is "two billion, two hundred thirty-one million, two hundred twenty thousand, two hundred twelve".