20120021212 has 6 divisors (see below), whose sum is σ = 35210037128. Its totient is φ = 10060010604.

The previous prime is 20120021191. The next prime is 20120021293. The reversal of 20120021212 is 21212002102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20120021192 and 20120021201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2515002648 + ... + 2515002655.

Almost surely, 2^20120021212 is an apocalyptic number.

It is an amenable number.

20120021212 is a deficient number, since it is larger than the sum of its proper divisors (15090015916).

20120021212 is a wasteful number, since it uses less digits than its factorization.

20120021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5030005307 (or 5030005305 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20120021212 its reverse (21212002102), we get a palindrome (41332023314).

The spelling of 20120021212 in words is "twenty billion, one hundred twenty million, twenty-one thousand, two hundred twelve".