121211210212 has 6 divisors (see below), whose sum is σ = 212119617878. Its totient is φ = 60605605104.

The previous prime is 121211210189. The next prime is 121211210231. The reversal of 121211210212 is 212012112121.

It can be written as a sum of positive squares in only one way, i.e., 108125222976 + 13085987236 = 328824^2 + 114394^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15151401273 + ... + 15151401280.

Almost surely, 2^121211210212 is an apocalyptic number.

It is an amenable number.

121211210212 is a deficient number, since it is larger than the sum of its proper divisors (90908407666).

121211210212 is a wasteful number, since it uses less digits than its factorization.

121211210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30302802557 (or 30302802555 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121211210212 its reverse (212012112121), we get a palindrome (333223322333).

The spelling of 121211210212 in words is "one hundred twenty-one billion, two hundred eleven million, two hundred ten thousand, two hundred twelve".