2101231212 has 48 divisors (see below), whose sum is σ = 5358753792. Its totient is φ = 637943040.

The previous prime is 2101231211. The next prime is 2101231219. The reversal of 2101231212 is 2121321012.

It is a junction number, because it is equal to n+sod(n) for n = 2101231191 and 2101231200.

It is not an unprimeable number, because it can be changed into a prime (2101231211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159808 + ... + 172455.

It is an arithmetic number, because the mean of its divisors is an integer number (111640704).

Almost surely, 2^2101231212 is an apocalyptic number.

It is an amenable number.

2101231212 is an abundant number, since it is smaller than the sum of its proper divisors (3257522580).

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

2101231212 is a wasteful number, since it uses less digits than its factorization.

2101231212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332318 (or 332316 counting only the distinct ones).

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

The square root of 2101231212 is about 45839.1886053844. The cubic root of 2101231212 is about 1280.8293802902.

Adding to 2101231212 its reverse (2121321012), we get a palindrome (4222552224).

The spelling of 2101231212 in words is "two billion, one hundred one million, two hundred thirty-one thousand, two hundred twelve".