20101213001 has 12 divisors (see below), whose sum is σ = 21618990480. Its totient is φ = 18638039880.

The previous prime is 20101212997. The next prime is 20101213007. The reversal of 20101213001 is 10031210102.

It is not a de Polignac number, because 20101213001 - 2² = 20101212997 is a prime.

It is a super-2 number, since 2×20101213001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101213007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 197495 + ... + 281436.

It is an arithmetic number, because the mean of its divisors is an integer number (1801582540).

Almost surely, 2^20101213001 is an apocalyptic number.

It is an amenable number.

20101213001 is a deficient number, since it is larger than the sum of its proper divisors (1517777479).

20101213001 is an equidigital number, since it uses as much as digits as its factorization.

20101213001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479044 (or 478997 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20101213001 its reverse (10031210102), we get a palindrome (30132423103).

The spelling of 20101213001 in words is "twenty billion, one hundred one million, two hundred thirteen thousand, one".