201121244031 has 4 divisors (see below), whose sum is σ = 268161658712. Its totient is φ = 134080829352.

The previous prime is 201121244029. The next prime is 201121244041. The reversal of 201121244031 is 130442121102.

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

It is not a de Polignac number, because 201121244031 - 2¹ = 201121244029 is a prime.

It is a super-2 number, since 2×201121244031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201121243989 and 201121244007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121244041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33520207336 + ... + 33520207341.

It is an arithmetic number, because the mean of its divisors is an integer number (67040414678).

Almost surely, 2^201121244031 is an apocalyptic number.

201121244031 is a deficient number, since it is larger than the sum of its proper divisors (67040414681).

201121244031 is an equidigital number, since it uses as much as digits as its factorization.

201121244031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67040414680.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 201121244031 its reverse (130442121102), we get a palindrome (331563365133).

The spelling of 201121244031 in words is "two hundred one billion, one hundred twenty-one million, two hundred forty-four thousand, thirty-one".