201221103031 has 8 divisors (see below), whose sum is σ = 216723188304. Its totient is φ = 185722380480.

The previous prime is 201221103029. The next prime is 201221103047. The reversal of 201221103031 is 130301122102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201221103031 - 2¹ = 201221103029 is a prime.

It is a super-2 number, since 2×201221103031² (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 = 201221102996 and 201221103014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221103001) 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, 715705 + ... + 956386.

It is an arithmetic number, because the mean of its divisors is an integer number (27090398538).

Almost surely, 2^201221103031 is an apocalyptic number.

201221103031 is a deficient number, since it is larger than the sum of its proper divisors (15502085273).

201221103031 is a wasteful number, since it uses less digits than its factorization.

201221103031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681361.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 201221103031 its reverse (130301122102), we get a palindrome (331522225133).

The spelling of 201221103031 in words is "two hundred one billion, two hundred twenty-one million, one hundred three thousand, thirty-one".