2001231321102 has 48 divisors (see below), whose sum is σ = 4674440101968. Its totient is φ = 615117283200.

The previous prime is 2001231321071. The next prime is 2001231321119. The reversal of 2001231321102 is 2011231321002.

2001231321102 is a `hidden beast` number, since 200 + 12 + 31 + 321 + 102 = 666.

It is a super-3 number, since 3×2001231321102³ (a number of 38 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4264024 + ... + 4710027.

It is an arithmetic number, because the mean of its divisors is an integer number (97384168791).

Almost surely, 2^{2001231321102} is an apocalyptic number.

2001231321102 is an abundant number, since it is smaller than the sum of its proper divisors (2673208780866).

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

2001231321102 is a wasteful number, since it uses less digits than its factorization.

2001231321102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8975025 (or 8975022 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 2001231321102 its reverse (2011231321002), we get a palindrome (4012462642104).

The spelling of 2001231321102 in words is "two trillion, one billion, two hundred thirty-one million, three hundred twenty-one thousand, one hundred two".