121121210201212 has 24 divisors (see below), whose sum is σ = 228499110788256. Its totient is φ = 55845228124608.

The previous prime is 121121210201191. The next prime is 121121210201227. The reversal of 121121210201212 is 212102012121121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121121210201212.

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, 1184716963 + ... + 1184819194.

It is an arithmetic number, because the mean of its divisors is an integer number (9520796282844).

Almost surely, 2^{121121210201212} is an apocalyptic number.

It is an amenable number.

121121210201212 is a deficient number, since it is larger than the sum of its proper divisors (107377900587044).

121121210201212 is a wasteful number, since it uses less digits than its factorization.

121121210201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369537157 (or 2369537155 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121121210201212 its reverse (212102012121121), we get a palindrome (333223222322333).

The spelling of 121121210201212 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred ten million, two hundred one thousand, two hundred twelve".