212210121212 has 24 divisors (see below), whose sum is σ = 392434481040. Its totient is φ = 100129443840.

The previous prime is 212210121173. The next prime is 212210121239. The reversal of 212210121212 is 212121012212.

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, 5412839 + ... + 5451902.

It is an arithmetic number, because the mean of its divisors is an integer number (16351436710).

Almost surely, 2^212210121212 is an apocalyptic number.

It is an amenable number.

212210121212 is a deficient number, since it is larger than the sum of its proper divisors (180224359828).

212210121212 is a wasteful number, since it uses less digits than its factorization.

212210121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10865021 (or 10865019 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212210121212 its reverse (212121012212), we get a palindrome (424331133424).

The spelling of 212210121212 in words is "two hundred twelve billion, two hundred ten million, one hundred twenty-one thousand, two hundred twelve".