121000021011111 has 32 divisors (see below), whose sum is σ = 177744958868736. Its totient is φ = 72606311840000.

The previous prime is 121000021011109. The next prime is 121000021011179. The reversal of 121000021011111 is 111110120000121.

It is a cyclic number.

It is not a de Polignac number, because 121000021011111 - 2¹ = 121000021011109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000021091111) 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, 312531931 + ... + 312918851.

It is an arithmetic number, because the mean of its divisors is an integer number (5554529964648).

Almost surely, 2^{121000021011111} is an apocalyptic number.

121000021011111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121000021011111 is a deficient number, since it is larger than the sum of its proper divisors (56744937857625).

121000021011111 is a wasteful number, since it uses less digits than its factorization.

121000021011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480863.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 121000021011111 its reverse (111110120000121), we get a palindrome (232110141011232).

It can be divided in two parts, 1210000 and 21011111, that added together give a triangular number (22221111 = T₆₆₆₆).

The spelling of 121000021011111 in words is "one hundred twenty-one trillion, twenty-one million, eleven thousand, one hundred eleven".