121122222212 has 6 divisors (see below), whose sum is σ = 211963888878. Its totient is φ = 60561111104.

The previous prime is 121122222211. The next prime is 121122222241. The reversal of 121122222212 is 212222221121.

It can be written as a sum of positive squares in only one way, i.e., 109366458436 + 11755763776 = 330706^2 + 108424^2 .

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

It is not an unprimeable number, because it can be changed into a prime (121122222211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15140277773 + ... + 15140277780.

It is an arithmetic number, because the mean of its divisors is an integer number (35327314813).

Almost surely, 2^121122222212 is an apocalyptic number.

It is an amenable number.

121122222212 is a deficient number, since it is larger than the sum of its proper divisors (90841666666).

121122222212 is a wasteful number, since it uses less digits than its factorization.

121122222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30280555557 (or 30280555555 counting only the distinct ones).

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

Adding to 121122222212 its reverse (212222221121), we get a palindrome (333344443333).

The spelling of 121122222212 in words is "one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred twelve".