12101212212021 has 12 divisors (see below), whose sum is σ = 17482909117440. Its totient is φ = 8065914638760.

The previous prime is 12101212212017. The next prime is 12101212212049. The reversal of 12101212212021 is 12021221210121.

12101212212021 is a `hidden beast` number, since 121 + 0 + 121 + 221 + 202 + 1 = 666.

It is not a de Polignac number, because 12101212212021 - 2² = 12101212212017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12101212211985 and 12101212212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101212212121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129964981 + ... + 130058058.

It is an arithmetic number, because the mean of its divisors is an integer number (1456909093120).

Almost surely, 2^{12101212212021} is an apocalyptic number.

It is an amenable number.

12101212212021 is a deficient number, since it is larger than the sum of its proper divisors (5381696905419).

12101212212021 is a wasteful number, since it uses less digits than its factorization.

12101212212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260028216 (or 260028213 counting only the distinct ones).

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

Adding to 12101212212021 its reverse (12021221210121), we get a palindrome (24122433422142).

The spelling of 12101212212021 in words is "twelve trillion, one hundred one billion, two hundred twelve million, two hundred twelve thousand, twenty-one".