2121023101211 has 12 divisors (see below), whose sum is σ = 2482086923568. Its totient is φ = 1807133447952.

The previous prime is 2121023101199. The next prime is 2121023101237. The reversal of 2121023101211 is 1121013201212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2121023101211 is a prime.

It is a super-3 number, since 3×2121023101211³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2121023101211.

It is not an unprimeable number, because it can be changed into a prime (2121023101291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129591176 + ... + 129607541.

It is an arithmetic number, because the mean of its divisors is an integer number (206840576964).

Almost surely, 2^{2121023101211} is an apocalyptic number.

2121023101211 is a deficient number, since it is larger than the sum of its proper divisors (361063822357).

2121023101211 is a wasteful number, since it uses less digits than its factorization.

2121023101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259198898 (or 259198891 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2121023101211 its reverse (1121013201212), we get a palindrome (3242036302423).

The spelling of 2121023101211 in words is "two trillion, one hundred twenty-one billion, twenty-three million, one hundred one thousand, two hundred eleven".