201220223131 has 4 divisors (see below), whose sum is σ = 203100786072. Its totient is φ = 199339660192.

The previous prime is 201220223123. The next prime is 201220223147. The reversal of 201220223131 is 131322022102.

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

It is a cyclic number.

It is not a de Polignac number, because 201220223131 - 2³ = 201220223123 is a prime.

It is a super-2 number, since 2×201220223131² (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 = 201220223099 and 201220223108.

It is not an unprimeable number, because it can be changed into a prime (201220223231) 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, 940281310 + ... + 940281523.

It is an arithmetic number, because the mean of its divisors is an integer number (50775196518).

Almost surely, 2^201220223131 is an apocalyptic number.

201220223131 is a deficient number, since it is larger than the sum of its proper divisors (1880562941).

201220223131 is a wasteful number, since it uses less digits than its factorization.

201220223131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880562940.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 201220223131 its reverse (131322022102), we get a palindrome (332542245233).

The spelling of 201220223131 in words is "two hundred one billion, two hundred twenty million, two hundred twenty-three thousand, one hundred thirty-one".