221201310000131 has 4 divisors (see below), whose sum is σ = 221578143578232. Its totient is φ = 220824476422032.

The previous prime is 221201310000107. The next prime is 221201310000137. The reversal of 221201310000131 is 131000013102122.

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 221201310000131 - 2¹⁰ = 221201309999107 is a prime.

It is a super-2 number, since 2×221201310000131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221201310000137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188416788170 + ... + 188416789343.

It is an arithmetic number, because the mean of its divisors is an integer number (55394535894558).

Almost surely, 2^{221201310000131} is an apocalyptic number.

221201310000131 is a deficient number, since it is larger than the sum of its proper divisors (376833578101).

221201310000131 is an equidigital number, since it uses as much as digits as its factorization.

221201310000131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376833578100.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 221201310000131 its reverse (131000013102122), we get a palindrome (352201323102253).

The spelling of 221201310000131 in words is "two hundred twenty-one trillion, two hundred one billion, three hundred ten million, one hundred thirty-one", and thus it is an aban number.