210122210111101 has 4 divisors (see below), whose sum is σ = 210122239117500. Its totient is φ = 210122181104704.

The previous prime is 210122210111041. The next prime is 210122210111183. The reversal of 210122210111101 is 101111012221012.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 151344764555076 + 58777445556025 = 12302226^2 + 7666645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210122210111101 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 (210122210121101) 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, 6547125 + ... + 21519973.

It is an arithmetic number, because the mean of its divisors is an integer number (52530559779375).

Almost surely, 2^{210122210111101} is an apocalyptic number.

It is an amenable number.

210122210111101 is a deficient number, since it is larger than the sum of its proper divisors (29006399).

210122210111101 is a wasteful number, since it uses less digits than its factorization.

210122210111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29006398.

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

Adding to 210122210111101 its reverse (101111012221012), we get a palindrome (311233222332113).

The spelling of 210122210111101 in words is "two hundred ten trillion, one hundred twenty-two billion, two hundred ten million, one hundred eleven thousand, one hundred one".