121021121002111 has 8 divisors (see below), whose sum is σ = 137763173314944. Its totient is φ = 105235757392920.

The previous prime is 121021121002057. The next prime is 121021121002211. The reversal of 121021121002111 is 111200121120121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121021121002111 - 2¹¹ = 121021121000063 is a prime.

It is a super-2 number, since 2×121021121002111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021121002211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239172175641 + ... + 239172176146.

It is an arithmetic number, because the mean of its divisors is an integer number (17220396664368).

Almost surely, 2^{121021121002111} is an apocalyptic number.

121021121002111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121021121002111 is a deficient number, since it is larger than the sum of its proper divisors (16742052312833).

121021121002111 is a wasteful number, since it uses less digits than its factorization.

121021121002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478344351821.

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

Adding to 121021121002111 its reverse (111200121120121), we get a palindrome (232221242122232).

The spelling of 121021121002111 in words is "one hundred twenty-one trillion, twenty-one billion, one hundred twenty-one million, two thousand, one hundred eleven".