121121222122011 has 32 divisors (see below), whose sum is σ = 172646285137920. Its totient is φ = 75264246434304.

The previous prime is 121121222121989. The next prime is 121121222122037. The reversal of 121121222122011 is 110221222121121.

It is not a de Polignac number, because 121121222122011 - 2¹⁵ = 121121222089243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121121222126011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6349366 + ... + 16809428.

It is an arithmetic number, because the mean of its divisors is an integer number (5395196410560).

Almost surely, 2^{121121222122011} is an apocalyptic number.

121121222122011 is a deficient number, since it is larger than the sum of its proper divisors (51525063015909).

121121222122011 is a wasteful number, since it uses less digits than its factorization.

121121222122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10462275.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 121121222122011 its reverse (110221222121121), we get a palindrome (231342444243132).

The spelling of 121121222122011 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-two thousand, eleven".