202001021101001 has 4 divisors (see below), whose sum is σ = 202001123398932. Its totient is φ = 202000918803072.

The previous prime is 202001021100961. The next prime is 202001021101049. The reversal of 202001021101001 is 100101120100202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 116425200582601 + 85575820518400 = 10790051^2 + 9250720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202001021101001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202001021101091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48127520 + ... + 52156113.

It is an arithmetic number, because the mean of its divisors is an integer number (50500280849733).

Almost surely, 2^{202001021101001} is an apocalyptic number.

It is an amenable number.

202001021101001 is a deficient number, since it is larger than the sum of its proper divisors (102297931).

202001021101001 is a wasteful number, since it uses less digits than its factorization.

202001021101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102297930.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 202001021101001 its reverse (100101120100202), we get a palindrome (302102141201203).

The spelling of 202001021101001 in words is "two hundred two trillion, one billion, twenty-one million, one hundred one thousand, one".