121203111212 has 24 divisors (see below), whose sum is σ = 220377637200. Its totient is φ = 58256323776.

The previous prime is 121203111191. The next prime is 121203111221. The reversal of 121203111212 is 212111302121.

It is a happy 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, 2254778 + ... + 2307905.

It is an arithmetic number, because the mean of its divisors is an integer number (9182401550).

Almost surely, 2^121203111212 is an apocalyptic number.

It is an amenable number.

121203111212 is a deficient number, since it is larger than the sum of its proper divisors (99174525988).

121203111212 is a wasteful number, since it uses less digits than its factorization.

121203111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4562945 (or 4562943 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121203111212 its reverse (212111302121), we get a palindrome (333314413333).

The spelling of 121203111212 in words is "one hundred twenty-one billion, two hundred three million, one hundred eleven thousand, two hundred twelve".