2001021202236 has 24 divisors (see below), whose sum is σ = 5336056539520. Its totient is φ = 571720343472.

The previous prime is 2001021202183. The next prime is 2001021202237. The reversal of 2001021202236 is 6322021201002.

It is a super-2 number, since 2×2001021202236² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001021202237) 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, 11910840406 + ... + 11910840573.

Almost surely, 2^{2001021202236} is an apocalyptic number.

It is an amenable number.

2001021202236 is an abundant number, since it is smaller than the sum of its proper divisors (3335035337284).

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

2001021202236 is a wasteful number, since it uses less digits than its factorization.

2001021202236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23821680993 (or 23821680991 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 2001021202236 its reverse (6322021201002), we get a palindrome (8323042403238).

The spelling of 2001021202236 in words is "two trillion, one billion, twenty-one million, two hundred two thousand, two hundred thirty-six".