10001221212212 has 12 divisors (see below), whose sum is σ = 17514232596000. Its totient is φ = 4997154756216.

The previous prime is 10001221212163. The next prime is 10001221212247. The reversal of 10001221212212 is 21221212210001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 863955962 + ... + 863967537.

It is an arithmetic number, because the mean of its divisors is an integer number (1459519383000).

Almost surely, 2^{10001221212212} is an apocalyptic number.

It is an amenable number.

10001221212212 is a deficient number, since it is larger than the sum of its proper divisors (7513011383788).

10001221212212 is a wasteful number, since it uses less digits than its factorization.

10001221212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727924950 (or 1727924948 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 10001221212212 its reverse (21221212210001), we get a palindrome (31222433422213).

The spelling of 10001221212212 in words is "ten trillion, one billion, two hundred twenty-one million, two hundred twelve thousand, two hundred twelve".