20121202112212 has 24 divisors (see below), whose sum is σ = 37291468689216. Its totient is φ = 9479554009728.

The previous prime is 20121202112183. The next prime is 20121202112213. The reversal of 20121202112212 is 21221120212102.

It is a self number, because there is not a number n which added to its sum of digits gives 20121202112212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121202112213) 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, 1632148453 + ... + 1632160780.

It is an arithmetic number, because the mean of its divisors is an integer number (1553811195384).

Almost surely, 2^{20121202112212} is an apocalyptic number.

It is an amenable number.

20121202112212 is a deficient number, since it is larger than the sum of its proper divisors (17170266577004).

20121202112212 is a wasteful number, since it uses less digits than its factorization.

20121202112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3264309327 (or 3264309325 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20121202112212 its reverse (21221120212102), we get a palindrome (41342322324314).

The spelling of 20121202112212 in words is "twenty trillion, one hundred twenty-one billion, two hundred two million, one hundred twelve thousand, two hundred twelve".