201211001131 has 32 divisors (see below), whose sum is σ = 254185371648. Its totient is φ = 155192547840.

The previous prime is 201211001093. The next prime is 201211001141. The reversal of 201211001131 is 131100112102.

It is a happy number.

It is not a de Polignac number, because 201211001131 - 2¹¹ = 201210999083 is a prime.

It is a super-2 number, since 2×201211001131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201211001141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6369666 + ... + 6401176.

It is an arithmetic number, because the mean of its divisors is an integer number (7943292864).

Almost surely, 2^201211001131 is an apocalyptic number.

201211001131 is a deficient number, since it is larger than the sum of its proper divisors (52974370517).

201211001131 is a wasteful number, since it uses less digits than its factorization.

201211001131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33891.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 201211001131 its reverse (131100112102), we get a palindrome (332311113233).

The spelling of 201211001131 in words is "two hundred one billion, two hundred eleven million, one thousand, one hundred thirty-one".