2001021102 has 12 divisors (see below), whose sum is σ = 4335545760. Its totient is φ = 667007028.

The previous prime is 2001021101. The next prime is 2001021103. The reversal of 2001021102 is 2011201002.

It is an interprime number because it is at equal distance from previous prime (2001021101) and next prime (2001021103).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001021101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55583902 + ... + 55583937.

It is an arithmetic number, because the mean of its divisors is an integer number (361295480).

Almost surely, 2^2001021102 is an apocalyptic number.

2001021102 is an abundant number, since it is smaller than the sum of its proper divisors (2334524658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001021102 is a wasteful number, since it uses less digits than its factorization.

2001021102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111167847 (or 111167844 counting only the distinct ones).

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

The square root of 2001021102 is about 44732.7743606408. The cubic root of 2001021102 is about 1260.1354313988.

Adding to 2001021102 its reverse (2011201002), we get a palindrome (4012222104).

The spelling of 2001021102 in words is "two billion, one million, twenty-one thousand, one hundred two".