201001021101 has 8 divisors (see below), whose sum is σ = 297779290560. Its totient is φ = 134000680716.

The previous prime is 201001021057. The next prime is 201001021103. The reversal of 201001021101 is 101120100102.

It is a happy number.

It is not a de Polignac number, because 201001021101 - 2⁹ = 201001020589 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201001021103) 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, 3722241105 + ... + 3722241158.

It is an arithmetic number, because the mean of its divisors is an integer number (37222411320).

Almost surely, 2^201001021101 is an apocalyptic number.

It is an amenable number.

201001021101 is a deficient number, since it is larger than the sum of its proper divisors (96778269459).

201001021101 is an equidigital number, since it uses as much as digits as its factorization.

201001021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7444482272 (or 7444482266 counting only the distinct ones).

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

Adding to 201001021101 its reverse (101120100102), we get a palindrome (302121121203).

The spelling of 201001021101 in words is "two hundred one billion, one million, twenty-one thousand, one hundred one".