12121021222212 has 48 divisors (see below), whose sum is σ = 32322969620480. Its totient is φ = 3463122524832.

The previous prime is 12121021222207. The next prime is 12121021222249. The reversal of 12121021222212 is 21222212012121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12318339 + ... + 13265877.

Almost surely, 2^{12121021222212} is an apocalyptic number.

12121021222212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12121021222212 is an abundant number, since it is smaller than the sum of its proper divisors (20201948398268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12121021222212 is a wasteful number, since it uses less digits than its factorization.

12121021222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099840 (or 1099838 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12121021222212 its reverse (21222212012121), we get a palindrome (33343233234333).

The spelling of 12121021222212 in words is "twelve trillion, one hundred twenty-one billion, twenty-one million, two hundred twenty-two thousand, two hundred twelve".