121021212012112 has 20 divisors (see below), whose sum is σ = 234482148565920. Its totient is φ = 60509689801568.

The previous prime is 121021212012109. The next prime is 121021212012119. The reversal of 121021212012112 is 211210212120121.

It is a happy number.

It is a super-2 number, since 2×121021212012112² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121021212012112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021212012119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56172412 + ... + 58287067.

It is an arithmetic number, because the mean of its divisors is an integer number (11724107428296).

Almost surely, 2^{121021212012112} is an apocalyptic number.

It is an amenable number.

121021212012112 is a deficient number, since it is larger than the sum of its proper divisors (113460936553808).

121021212012112 is a wasteful number, since it uses less digits than its factorization.

121021212012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114525570 (or 114525564 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121021212012112 its reverse (211210212120121), we get a palindrome (332231424132233).

The spelling of 121021212012112 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred twelve million, twelve thousand, one hundred twelve".