2220131421 has 12 divisors (see below), whose sum is σ = 3208037820. Its totient is φ = 1479542400.

The previous prime is 2220131411. The next prime is 2220131429. The reversal of 2220131421 is 1241310222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1509322500 + 710808921 = 38850^2 + 26661^2 .

It is not a de Polignac number, because 2220131421 - 2¹⁵ = 2220098653 is a prime.

It is a super-2 number, since 2×2220131421² = 9857967053022958482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2220131394 and 2220131403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220131429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18826 + ... + 69243.

It is an arithmetic number, because the mean of its divisors is an integer number (267336485).

Almost surely, 2^2220131421 is an apocalyptic number.

It is an amenable number.

2220131421 is a deficient number, since it is larger than the sum of its proper divisors (987906399).

2220131421 is a wasteful number, since it uses less digits than its factorization.

2220131421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90876 (or 90873 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2220131421 is about 47118.2705646122. The cubic root of 2220131421 is about 1304.5464914677.

Adding to 2220131421 its reverse (1241310222), we get a palindrome (3461441643).

The spelling of 2220131421 in words is "two billion, two hundred twenty million, one hundred thirty-one thousand, four hundred twenty-one".