121022213212 has 24 divisors (see below), whose sum is σ = 212699133360. Its totient is φ = 60251184000.

The previous prime is 121022213209. The next prime is 121022213219. The reversal of 121022213212 is 212312220121.

It is a self number, because there is not a number n which added to its sum of digits gives 121022213212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022213219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3526038 + ... + 3560194.

It is an arithmetic number, because the mean of its divisors is an integer number (8862463890).

Almost surely, 2^121022213212 is an apocalyptic number.

It is an amenable number.

121022213212 is a deficient number, since it is larger than the sum of its proper divisors (91676920148).

121022213212 is a wasteful number, since it uses less digits than its factorization.

121022213212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37941 (or 37939 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 121022213212 its reverse (212312220121), we get a palindrome (333334433333).

The spelling of 121022213212 in words is "one hundred twenty-one billion, twenty-two million, two hundred thirteen thousand, two hundred twelve".