121021212112 has 20 divisors (see below), whose sum is σ = 235917122560. Its totient is φ = 60139374048.

The previous prime is 121021212073. The next prime is 121021212133. The reversal of 121021212112 is 211212120121.

It is a super-2 number, since 2×121021212112² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 23199312 + ... + 23204527.

It is an arithmetic number, because the mean of its divisors is an integer number (11795856128).

Almost surely, 2^121021212112 is an apocalyptic number.

It is an amenable number.

121021212112 is a deficient number, since it is larger than the sum of its proper divisors (114895910448).

121021212112 is a wasteful number, since it uses less digits than its factorization.

121021212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46404010 (or 46404004 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121021212112 its reverse (211212120121), we get a palindrome (332233332233).

The spelling of 121021212112 in words is "one hundred twenty-one billion, twenty-one million, two hundred twelve thousand, one hundred twelve".