211021112020121 has 32 divisors (see below), whose sum is σ = 230760769249920. Its totient is φ = 191799037361664.

The previous prime is 211021112020091. The next prime is 211021112020153. The reversal of 211021112020121 is 121020211120112.

It is a cyclic number.

It is not a de Polignac number, because 211021112020121 - 2⁴⁶ = 140652367842457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211021112020121.

It is not an unprimeable number, because it can be changed into a prime (211021112020181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 492730346 + ... + 493158428.

It is an arithmetic number, because the mean of its divisors is an integer number (7211274039060).

Almost surely, 2^{211021112020121} is an apocalyptic number.

It is an amenable number.

211021112020121 is a deficient number, since it is larger than the sum of its proper divisors (19739657229799).

211021112020121 is a wasteful number, since it uses less digits than its factorization.

211021112020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429705.

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

Adding to 211021112020121 its reverse (121020211120112), we get a palindrome (332041323140233).

Subtracting from 211021112020121 its reverse (121020211120112), we obtain a palindrome (90000900900009).

The spelling of 211021112020121 in words is "two hundred eleven trillion, twenty-one billion, one hundred twelve million, twenty thousand, one hundred twenty-one".