201131022101 has 4 divisors (see below), whose sum is σ = 201530885472. Its totient is φ = 200731158732.

The previous prime is 201131022083. The next prime is 201131022109. The reversal of 201131022101 is 101220131102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201131022101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201131022109) 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, 199930931 + ... + 199931936.

It is an arithmetic number, because the mean of its divisors is an integer number (50382721368).

Almost surely, 2^201131022101 is an apocalyptic number.

It is an amenable number.

201131022101 is a deficient number, since it is larger than the sum of its proper divisors (399863371).

201131022101 is an equidigital number, since it uses as much as digits as its factorization.

201131022101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399863370.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 201131022101 its reverse (101220131102), we get a palindrome (302351153203).

The spelling of 201131022101 in words is "two hundred one billion, one hundred thirty-one million, twenty-two thousand, one hundred one".