121222221212 has 48 divisors (see below), whose sum is σ = 219137909760. Its totient is φ = 58642824000.

The previous prime is 121222221209. The next prime is 121222221247. The reversal of 121222221212 is 212122222121.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13116089 + ... + 13125327.

It is an arithmetic number, because the mean of its divisors is an integer number (4565373120).

Almost surely, 2^121222221212 is an apocalyptic number.

It is an amenable number.

121222221212 is a deficient number, since it is larger than the sum of its proper divisors (97915688548).

121222221212 is a wasteful number, since it uses less digits than its factorization.

121222221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10082 (or 10080 counting only the distinct ones).

The product of its digits is 256, while the sum is 20.

Adding to 121222221212 its reverse (212122222121), we get a palindrome (333344443333).

Subtracting 121222221212 from its reverse (212122222121), we obtain a palindrome (90900000909).

It can be divided in two parts, 12122222121 and 2, that multiplied together give a palindrome (24244444242).

The spelling of 121222221212 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred twelve".