202011011001 has 6 divisors (see below), whose sum is σ = 291793682570. Its totient is φ = 134674007328.

The previous prime is 202011010991. The next prime is 202011011021. The reversal of 202011011001 is 100110110202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 192857114025 + 9153896976 = 439155^2 + 95676^2 .

It is not a de Polignac number, because 202011011001 - 2²¹ = 202008913849 is a prime.

It is a super-2 number, since 2×202011011001² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 22445667889 = 202011011001 / (2 + 0 + 2 + 0 + 1 + 1 + 0 + 1 + 1 + 0 + 0 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (202011011021) 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, 11222833936 + ... + 11222833953.

Almost surely, 2^202011011001 is an apocalyptic number.

It is an amenable number.

202011011001 is a deficient number, since it is larger than the sum of its proper divisors (89782671569).

202011011001 is a wasteful number, since it uses less digits than its factorization.

202011011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22445667895 (or 22445667892 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 202011011001 its reverse (100110110202), we get a palindrome (302121121203).

The spelling of 202011011001 in words is "two hundred two billion, eleven million, eleven thousand, one".