211020122101 has 4 divisors (see below), whose sum is σ = 214596734400. Its totient is φ = 207443509804.

The previous prime is 211020122083. The next prime is 211020122113. The reversal of 211020122101 is 101221020112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211020122101 - 2¹¹ = 211020120053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211020122141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1788306061 + ... + 1788306178.

It is an arithmetic number, because the mean of its divisors is an integer number (53649183600).

Almost surely, 2^211020122101 is an apocalyptic number.

It is an amenable number.

211020122101 is a deficient number, since it is larger than the sum of its proper divisors (3576612299).

211020122101 is an equidigital number, since it uses as much as digits as its factorization.

211020122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3576612298.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211020122101 its reverse (101221020112), we get a palindrome (312241142213).

The spelling of 211020122101 in words is "two hundred eleven billion, twenty million, one hundred twenty-two thousand, one hundred one".