121021021020211 has 16 divisors (see below), whose sum is σ = 130777313716224. Its totient is φ = 111329237476224.

The previous prime is 121021021020197. The next prime is 121021021020233. The reversal of 121021021020211 is 112020120120121.

It is a cyclic number.

It is not a de Polignac number, because 121021021020211 - 2¹⁵ = 121021020987443 is a prime.

It is a super-2 number, since 2×121021021020211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121021021020241) 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, 9193651 + ... + 18071116.

It is an arithmetic number, because the mean of its divisors is an integer number (8173582107264).

Almost surely, 2^{121021021020211} is an apocalyptic number.

121021021020211 is a deficient number, since it is larger than the sum of its proper divisors (9756292696013).

121021021020211 is a wasteful number, since it uses less digits than its factorization.

121021021020211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27265950.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121021021020211 its reverse (112020120120121), we get a palindrome (233041141140332).

The spelling of 121021021020211 in words is "one hundred twenty-one trillion, twenty-one billion, twenty-one million, twenty thousand, two hundred eleven".