201220021031 has 8 divisors (see below), whose sum is σ = 206911593504. Its totient is φ = 195565770880.

The previous prime is 201220021019. The next prime is 201220021073. The reversal of 201220021031 is 130120022102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 201220021031 - 2¹⁴ = 201220004647 is a prime.

It is a super-2 number, since 2×201220021031² (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 = 201220020997 and 201220021015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220021001) 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 7 ways as a sum of consecutive naturals, for example, 9319646 + ... + 9341211.

It is an arithmetic number, because the mean of its divisors is an integer number (25863949188).

Almost surely, 2^201220021031 is an apocalyptic number.

201220021031 is a deficient number, since it is larger than the sum of its proper divisors (5691572473).

201220021031 is a wasteful number, since it uses less digits than its factorization.

201220021031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18661161.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 201220021031 its reverse (130120022102), we get a palindrome (331340043133).

The spelling of 201220021031 in words is "two hundred one billion, two hundred twenty million, twenty-one thousand, thirty-one".