1242022231 has 4 divisors (see below), whose sum is σ = 1243102464. Its totient is φ = 1240942000.

The previous prime is 1242022217. The next prime is 1242022259. The reversal of 1242022231 is 1322202421.

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

It is a cyclic number.

It is not a de Polignac number, because 1242022231 - 2²¹ = 1239925079 is a prime.

It is a super-2 number, since 2×1242022231² = 3085238444596434722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242022199 and 1242022208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242028231) 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, 538390 + ... + 540691.

It is an arithmetic number, because the mean of its divisors is an integer number (310775616).

Almost surely, 2^1242022231 is an apocalyptic number.

1242022231 is a deficient number, since it is larger than the sum of its proper divisors (1080233).

1242022231 is a wasteful number, since it uses less digits than its factorization.

1242022231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080232.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1242022231 is about 35242.3357767331. The cubic root of 1242022231 is about 1074.9207746914.

Adding to 1242022231 its reverse (1322202421), we get a palindrome (2564224652).

The spelling of 1242022231 in words is "one billion, two hundred forty-two million, twenty-two thousand, two hundred thirty-one".