2000101221 has 16 divisors (see below), whose sum is σ = 3137414400. Its totient is φ = 1254965184.

The previous prime is 2000101211. The next prime is 2000101241. The reversal of 2000101221 is 1221010002.

It is not a de Polignac number, because 2000101221 - 2⁶ = 2000101157 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000101211) 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, 2178301 + ... + 2179218.

It is an arithmetic number, because the mean of its divisors is an integer number (196088400).

Almost surely, 2^2000101221 is an apocalyptic number.

It is an amenable number.

2000101221 is a deficient number, since it is larger than the sum of its proper divisors (1137313179).

2000101221 is a wasteful number, since it uses less digits than its factorization.

2000101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4357545 (or 4357539 counting only the distinct ones).

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

The square root of 2000101221 is about 44722.4912208611. The cubic root of 2000101221 is about 1259.9423046144.

Adding to 2000101221 its reverse (1221010002), we get a palindrome (3221111223).

The spelling of 2000101221 in words is "two billion, one hundred one thousand, two hundred twenty-one".