201000211121 has 8 divisors (see below), whose sum is σ = 201242410824. Its totient is φ = 200758072320.

The previous prime is 201000211109. The next prime is 201000211123. The reversal of 201000211121 is 121112000102.

It can be written as a sum of positive squares in 4 ways, for example, as 31803728896 + 169196482225 = 178336^2 + 411335^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201000211121 - 2⁶ = 201000211057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201000211123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12128681 + ... + 12145241.

It is an arithmetic number, because the mean of its divisors is an integer number (25155301353).

Almost surely, 2^201000211121 is an apocalyptic number.

It is an amenable number.

201000211121 is a deficient number, since it is larger than the sum of its proper divisors (242199703).

201000211121 is a wasteful number, since it uses less digits than its factorization.

201000211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30451.

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

Adding to 201000211121 its reverse (121112000102), we get a palindrome (322112211223).

The spelling of 201000211121 in words is "two hundred one billion, two hundred eleven thousand, one hundred twenty-one".