131221032033 has 32 divisors (see below), whose sum is σ = 226670617600. Its totient is φ = 65572566336.

The previous prime is 131221032031. The next prime is 131221032043. The reversal of 131221032033 is 330230122131.

It is not a de Polignac number, because 131221032033 - 2¹ = 131221032031 is a prime.

It is a super-2 number, since 2×131221032033² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (131221032031) 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, 12643843 + ... + 12654216.

It is an arithmetic number, because the mean of its divisors is an integer number (7083456800).

Almost surely, 2^131221032033 is an apocalyptic number.

131221032033 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

131221032033 is a deficient number, since it is larger than the sum of its proper divisors (95449585567).

131221032033 is a wasteful number, since it uses less digits than its factorization.

131221032033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25298101.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 131221032033 its reverse (330230122131), we get a palindrome (461451154164).

The spelling of 131221032033 in words is "one hundred thirty-one billion, two hundred twenty-one million, thirty-two thousand, thirty-three".