121021021211021 has 16 divisors (see below), whose sum is σ = 133451469600000. Its totient is φ = 109296753523776.

The previous prime is 121021021211011. The next prime is 121021021211143. The reversal of 121021021211021 is 120112120120121.

It is a cyclic number.

It is not a de Polignac number, because 121021021211021 - 2²⁶ = 121020954102157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021021211011) 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, 1390075946 + ... + 1390163003.

It is an arithmetic number, because the mean of its divisors is an integer number (8340716850000).

Almost surely, 2^{121021021211021} is an apocalyptic number.

It is an amenable number.

121021021211021 is a deficient number, since it is larger than the sum of its proper divisors (12430448388979).

121021021211021 is a wasteful number, since it uses less digits than its factorization.

121021021211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780239076.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121021021211021 its reverse (120112120120121), we get a palindrome (241133141331142).

The spelling of 121021021211021 in words is "one hundred twenty-one trillion, twenty-one billion, twenty-one million, two hundred eleven thousand, twenty-one".