211200020111021 has 16 divisors (see below), whose sum is σ = 222732934160640. Its totient is φ = 199708978075200.

The previous prime is 211200020111011. The next prime is 211200020111083. The reversal of 211200020111021 is 120111020002112.

211200020111021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 211200020111021 - 2¹⁸ = 211200019848877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211200020110987 and 211200020111005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211200020111011) 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, 45455996 + ... + 49886346.

It is an arithmetic number, because the mean of its divisors is an integer number (13920808385040).

Almost surely, 2^{211200020111021} is an apocalyptic number.

It is an amenable number.

211200020111021 is a deficient number, since it is larger than the sum of its proper divisors (11532914049619).

211200020111021 is a wasteful number, since it uses less digits than its factorization.

211200020111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4435076.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211200020111021 its reverse (120111020002112), we get a palindrome (331311040113133).

The spelling of 211200020111021 in words is "two hundred eleven trillion, two hundred billion, twenty million, one hundred eleven thousand, twenty-one".