202111010001 has 64 divisors (see below), whose sum is σ = 321310080000. Its totient is φ = 125178172416.

The previous prime is 202111009979. The next prime is 202111010027. The reversal of 202111010001 is 100010111202.

It is a happy number.

It is not a de Polignac number, because 202111010001 - 2⁹ = 202111009489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (202111010041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12673905 + ... + 12689841.

It is an arithmetic number, because the mean of its divisors is an integer number (5020470000).

Almost surely, 2^202111010001 is an apocalyptic number.

It is an amenable number.

202111010001 is a deficient number, since it is larger than the sum of its proper divisors (119199069999).

202111010001 is a wasteful number, since it uses less digits than its factorization.

202111010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16443 (or 16437 counting only the distinct ones).

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

Adding to 202111010001 its reverse (100010111202), we get a palindrome (302121121203).

The spelling of 202111010001 in words is "two hundred two billion, one hundred eleven million, ten thousand, one".