2100121001 has 8 divisors (see below), whose sum is σ = 2291402208. Its totient is φ = 1908900000.

The previous prime is 2100120941. The next prime is 2100121003. The reversal of 2100121001 is 1001210012.

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 2100121001 - 2⁶ = 2100120937 is a prime.

It is a deceptive number, since it divides R_2100121000.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2100121001.

It is not an unprimeable number, because it can be changed into a prime (2100121003) 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, 89501 + ... + 110501.

It is an arithmetic number, because the mean of its divisors is an integer number (286425276).

Almost surely, 2^2100121001 is an apocalyptic number.

It is an amenable number.

2100121001 is a deficient number, since it is larger than the sum of its proper divisors (191281207).

2100121001 is a wasteful number, since it uses less digits than its factorization.

2100121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30103.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 2100121001 is about 45827.0771596880. The cubic root of 2100121001 is about 1280.6037599690.

Adding to 2100121001 its reverse (1001210012), we get a palindrome (3101331013).

It can be divided in two parts, 210012 and 1001, that multiplied together give a palindrome (210222012).

The spelling of 2100121001 in words is "two billion, one hundred million, one hundred twenty-one thousand, one".