121121211011 has 16 divisors (see below), whose sum is σ = 123225357888. Its totient is φ = 119037072000.

The previous prime is 121121210971. The next prime is 121121211037. The reversal of 121121211011 is 110112121121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121121211011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121211311) 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, 11544410 + ... + 11554896.

It is an arithmetic number, because the mean of its divisors is an integer number (7701584868).

Almost surely, 2^121121211011 is an apocalyptic number.

121121211011 is a deficient number, since it is larger than the sum of its proper divisors (2104146877).

121121211011 is a wasteful number, since it uses less digits than its factorization.

121121211011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11422.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 121121211011 its reverse (110112121121), we get a palindrome (231233332132).

The spelling of 121121211011 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred eleven thousand, eleven".