121021212011 has 16 divisors (see below), whose sum is σ = 139945590720. Its totient is φ = 102507102720.

The previous prime is 121021211917. The next prime is 121021212019. The reversal of 121021212011 is 110212120121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121021212011 is a prime.

It is a super-2 number, since 2×121021212011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121021212019) 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, 1028855 + ... + 1140431.

It is an arithmetic number, because the mean of its divisors is an integer number (8746599420).

Almost surely, 2^121021212011 is an apocalyptic number.

121021212011 is a deficient number, since it is larger than the sum of its proper divisors (18924378709).

121021212011 is a wasteful number, since it uses less digits than its factorization.

121021212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113414.

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

Adding to 121021212011 its reverse (110212120121), we get a palindrome (231233332132).

It can be divided in two parts, 1 and 21021212011, that added together give a palindrome (21021212012).

The spelling of 121021212011 in words is "one hundred twenty-one billion, twenty-one million, two hundred twelve thousand, eleven".