211020111002121 has 32 divisors (see below), whose sum is σ = 282303658377216. Its totient is φ = 140209062840000.

The previous prime is 211020111002047. The next prime is 211020111002147. The reversal of 211020111002121 is 121200111020112.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-211020111002121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211020111002121.

It is not an unprimeable number, because it can be changed into a prime (211020111002021) 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, 5718528771 + ... + 5718565671.

It is an arithmetic number, because the mean of its divisors is an integer number (8821989324288).

Almost surely, 2^{211020111002121} is an apocalyptic number.

It is an amenable number.

211020111002121 is a deficient number, since it is larger than the sum of its proper divisors (71283547375095).

211020111002121 is a wasteful number, since it uses less digits than its factorization.

211020111002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41773.

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

Adding to 211020111002121 its reverse (121200111020112), we get a palindrome (332220222022233).

The spelling of 211020111002121 in words is "two hundred eleven trillion, twenty billion, one hundred eleven million, two thousand, one hundred twenty-one".