1212112202121 has 64 divisors (see below), whose sum is σ = 1981266739200. Its totient is φ = 728974743552.

The previous prime is 1212112202117. The next prime is 1212112202149. The reversal of 1212112202121 is 1212022112121.

1212112202121 is a `hidden beast` number, since 1 + 21 + 211 + 220 + 212 + 1 = 666.

It is not a de Polignac number, because 1212112202121 - 2² = 1212112202117 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1212112202094 and 1212112202103.

It is not an unprimeable number, because it can be changed into a prime (1212112202221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2400841 + ... + 2861513.

It is an arithmetic number, because the mean of its divisors is an integer number (30957292800).

Almost surely, 2^{1212112202121} is an apocalyptic number.

It is an amenable number.

1212112202121 is a deficient number, since it is larger than the sum of its proper divisors (769154537079).

1212112202121 is a wasteful number, since it uses less digits than its factorization.

1212112202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460947 (or 460941 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1212112202121 its reverse (1212022112121), we get a palindrome (2424134314242).

The spelling of 1212112202121 in words is "one trillion, two hundred twelve billion, one hundred twelve million, two hundred two thousand, one hundred twenty-one".