2121021101211 has 16 divisors (see below), whose sum is σ = 2835999936000. Its totient is φ = 1410032777760.

The previous prime is 2121021101197. The next prime is 2121021101249. The reversal of 2121021101211 is 1121011201212.

It is a happy number.

It is not a de Polignac number, because 2121021101211 - 2¹¹ = 2121021099163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121021101011) 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, 1267321 + ... + 2418293.

It is an arithmetic number, because the mean of its divisors is an integer number (177249996000).

Almost surely, 2^{2121021101211} is an apocalyptic number.

2121021101211 is a deficient number, since it is larger than the sum of its proper divisors (714978834789).

2121021101211 is a wasteful number, since it uses less digits than its factorization.

2121021101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152706.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2121021101211 its reverse (1121011201212), we get a palindrome (3242032302423).

The spelling of 2121021101211 in words is "two trillion, one hundred twenty-one billion, twenty-one million, one hundred one thousand, two hundred eleven".