210200121101 has 4 divisors (see below), whose sum is σ = 210477797052. Its totient is φ = 209922445152.

The previous prime is 210200121097. The next prime is 210200121107. The reversal of 210200121101 is 101121002012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 100553044201 + 109647076900 = 317101^2 + 331130^2 .

It is a cyclic number.

It is not a de Polignac number, because 210200121101 - 2² = 210200121097 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 (210200121107) 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, 138836840 + ... + 138838353.

It is an arithmetic number, because the mean of its divisors is an integer number (52619449263).

Almost surely, 2^210200121101 is an apocalyptic number.

It is an amenable number.

210200121101 is a deficient number, since it is larger than the sum of its proper divisors (277675951).

210200121101 is an equidigital number, since it uses as much as digits as its factorization.

210200121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277675950.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210200121101 its reverse (101121002012), we get a palindrome (311321123113).

The spelling of 210200121101 in words is "two hundred ten billion, two hundred million, one hundred twenty-one thousand, one hundred one".