20002121212 has 12 divisors (see below), whose sum is σ = 36525612816. Its totient is φ = 9566231840.

The previous prime is 20002121203. The next prime is 20002121231. The reversal of 20002121212 is 21212120002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20002121192 and 20002121201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108707089 + ... + 108707272.

It is an arithmetic number, because the mean of its divisors is an integer number (3043801068).

Almost surely, 2^20002121212 is an apocalyptic number.

It is an amenable number.

20002121212 is a deficient number, since it is larger than the sum of its proper divisors (16523491604).

20002121212 is a wasteful number, since it uses less digits than its factorization.

20002121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217414388 (or 217414386 counting only the distinct ones).

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

Adding to 20002121212 its reverse (21212120002), we get a palindrome (41214241214).

It can be divided in two parts, 2000 and 2121212, that added together give a palindrome (2123212).

The spelling of 20002121212 in words is "twenty billion, two million, one hundred twenty-one thousand, two hundred twelve".