131220420433 has 16 divisors (see below), whose sum is σ = 139867324416. Its totient is φ = 122819740560.

The previous prime is 131220420389. The next prime is 131220420449. The reversal of 131220420433 is 334024022131.

It is not a de Polignac number, because 131220420433 - 2¹³ = 131220412241 is a prime.

It is a super-2 number, since 2×131220420433² (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 = 131220420398 and 131220420407.

It is not an unprimeable number, because it can be changed into a prime (131220429433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7366768 + ... + 7384558.

It is an arithmetic number, because the mean of its divisors is an integer number (8741707776).

Almost surely, 2^131220420433 is an apocalyptic number.

It is an amenable number.

131220420433 is a deficient number, since it is larger than the sum of its proper divisors (8646903983).

131220420433 is a wasteful number, since it uses less digits than its factorization.

131220420433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24684.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 131220420433 its reverse (334024022131), we get a palindrome (465244442564).

The spelling of 131220420433 in words is "one hundred thirty-one billion, two hundred twenty million, four hundred twenty thousand, four hundred thirty-three".