211021100121 has 16 divisors (see below), whose sum is σ = 303584044736. Its totient is φ = 129610829376.

The previous prime is 211021100107. The next prime is 211021100131. The reversal of 211021100121 is 121001120112.

It is not a de Polignac number, because 211021100121 - 2²⁶ = 210953991257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211021100097 and 211021100106.

It is not an unprimeable number, because it can be changed into a prime (211021100131) 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, 5152450 + ... + 5193243.

It is an arithmetic number, because the mean of its divisors is an integer number (18974002796).

Almost surely, 2^211021100121 is an apocalyptic number.

It is an amenable number.

211021100121 is a deficient number, since it is larger than the sum of its proper divisors (92562944615).

211021100121 is a wasteful number, since it uses less digits than its factorization.

211021100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10346232.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 211021100121 its reverse (121001120112), we get a palindrome (332022220233).

The spelling of 211021100121 in words is "two hundred eleven billion, twenty-one million, one hundred thousand, one hundred twenty-one".