2121020021211 has 64 divisors (see below), whose sum is σ = 3490993228800. Its totient is φ = 1115459444736.

The previous prime is 2121020021189. The next prime is 2121020021233. The reversal of 2121020021211 is 1121200201212.

It is an interprime number because it is at equal distance from previous prime (2121020021189) and next prime (2121020021233).

It is not a de Polignac number, because 2121020021211 - 2¹⁰ = 2121020020187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121020021311) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 138720855 + ... + 138736143.

It is an arithmetic number, because the mean of its divisors is an integer number (54546769200).

Almost surely, 2^{2121020021211} is an apocalyptic number.

2121020021211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2121020021211 is a deficient number, since it is larger than the sum of its proper divisors (1369973207589).

2121020021211 is a wasteful number, since it uses less digits than its factorization.

2121020021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16788.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2121020021211 its reverse (1121200201212), we get a palindrome (3242220222423).

The spelling of 2121020021211 in words is "two trillion, one hundred twenty-one billion, twenty million, twenty-one thousand, two hundred eleven".