121222010111 has 16 divisors (see below), whose sum is σ = 123397093248. Its totient is φ = 119058271200.

The previous prime is 121222010101. The next prime is 121222010131. The reversal of 121222010111 is 111010222121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121222010111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222010101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45180176 + ... + 45182858.

It is an arithmetic number, because the mean of its divisors is an integer number (7712318328).

Almost surely, 2^121222010111 is an apocalyptic number.

121222010111 is a deficient number, since it is larger than the sum of its proper divisors (2175083137).

121222010111 is a wasteful number, since it uses less digits than its factorization.

121222010111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4502.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121222010111 its reverse (111010222121), we get a palindrome (232232232232).

It can be divided in two parts, 121222010 and 111, that added together give a palindrome (121222121).

The spelling of 121222010111 in words is "one hundred twenty-one billion, two hundred twenty-two million, ten thousand, one hundred eleven".