2121200120212 has 6 divisors (see below), whose sum is σ = 3712100210378. Its totient is φ = 1060600060104.

The previous prime is 2121200120173. The next prime is 2121200120227. The reversal of 2121200120212 is 2120210021212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1998361085956 + 122839034256 = 1413634^2 + 350484^2 .

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, 265150015023 + ... + 265150015030.

Almost surely, 2^{2121200120212} is an apocalyptic number.

It is an amenable number.

2121200120212 is a deficient number, since it is larger than the sum of its proper divisors (1590900090166).

2121200120212 is a wasteful number, since it uses less digits than its factorization.

2121200120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530300030057 (or 530300030055 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2121200120212 its reverse (2120210021212), we get a palindrome (4241410141424).

The spelling of 2121200120212 in words is "two trillion, one hundred twenty-one billion, two hundred million, one hundred twenty thousand, two hundred twelve".