131022000223421 has 4 divisors (see below), whose sum is σ = 131023254450972. Its totient is φ = 131020745995872.

The previous prime is 131022000223403. The next prime is 131022000223459. The reversal of 131022000223421 is 124322000220131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 62569460527396 + 68452539696025 = 7910086^2 + 8273605^2 .

It is a cyclic number.

It is not a de Polignac number, because 131022000223421 - 2¹⁰ = 131022000222397 is a prime.

It is a super-2 number, since 2×131022000223421² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131022000223021) 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, 626957066 + ... + 627166011.

It is an arithmetic number, because the mean of its divisors is an integer number (32755813612743).

Almost surely, 2^{131022000223421} is an apocalyptic number.

It is an amenable number.

131022000223421 is a deficient number, since it is larger than the sum of its proper divisors (1254227551).

131022000223421 is a wasteful number, since it uses less digits than its factorization.

131022000223421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254227550.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 131022000223421 its reverse (124322000220131), we get a palindrome (255344000443552).

The spelling of 131022000223421 in words is "one hundred thirty-one trillion, twenty-two billion, two hundred twenty-three thousand, four hundred twenty-one".