2131220212 has 12 divisors (see below), whose sum is σ = 4068693216. Its totient is φ = 968736440.

The previous prime is 2131220131. The next prime is 2131220213. The reversal of 2131220212 is 2120221312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131220213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24218368 + ... + 24218455.

It is an arithmetic number, because the mean of its divisors is an integer number (339057768).

Almost surely, 2^2131220212 is an apocalyptic number.

2131220212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2131220212 is a deficient number, since it is larger than the sum of its proper divisors (1937473004).

2131220212 is a wasteful number, since it uses less digits than its factorization.

2131220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48436838 (or 48436836 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2131220212 is about 46165.1406582932. The cubic root of 2131220212 is about 1286.8939981807.

Adding to 2131220212 its reverse (2120221312), we get a palindrome (4251441524).

The spelling of 2131220212 in words is "two billion, one hundred thirty-one million, two hundred twenty thousand, two hundred twelve".