121121222012 has 24 divisors (see below), whose sum is σ = 246348251520. Its totient is φ = 51029279280.

The previous prime is 121121222009. The next prime is 121121222041. The reversal of 121121222012 is 210222121121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36657314 + ... + 36660617.

It is an arithmetic number, because the mean of its divisors is an integer number (10264510480).

Almost surely, 2^121121222012 is an apocalyptic number.

It is an amenable number.

121121222012 is an abundant number, since it is smaller than the sum of its proper divisors (125227029508).

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

121121222012 is a wasteful number, since it uses less digits than its factorization.

121121222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73318001 (or 73317999 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121121222012 its reverse (210222121121), we get a palindrome (331343343133).

The spelling of 121121222012 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-two thousand, twelve".