2121000201 has 16 divisors (see below), whose sum is σ = 3143232000. Its totient is φ = 1413545904.

The previous prime is 2121000197. The next prime is 2121000227. The reversal of 2121000201 is 1020001212.

It is not a de Polignac number, because 2121000201 - 2² = 2121000197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2121000251) 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, 87400 + ... + 108998.

It is an arithmetic number, because the mean of its divisors is an integer number (196452000).

Almost surely, 2^2121000201 is an apocalyptic number.

It is an amenable number.

2121000201 is a deficient number, since it is larger than the sum of its proper divisors (1022231799).

2121000201 is a wasteful number, since it uses less digits than its factorization.

2121000201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25245 (or 25239 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2121000201 is about 46054.3179408837. The cubic root of 2121000201 is about 1284.8336526581.

Adding to 2121000201 its reverse (1020001212), we get a palindrome (3141001413).

The spelling of 2121000201 in words is "two billion, one hundred twenty-one million, two hundred one", and thus it is an aban number.