1122420021 has 8 divisors (see below), whose sum is σ = 1505211360. Its totient is φ = 743954352.

The previous prime is 1122420017. The next prime is 1122420083. The reversal of 1122420021 is 1200242211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1122420021 - 2² = 1122420017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122420821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1080811 + ... + 1081848.

It is an arithmetic number, because the mean of its divisors is an integer number (188151420).

Almost surely, 2^1122420021 is an apocalyptic number.

It is an amenable number.

1122420021 is a deficient number, since it is larger than the sum of its proper divisors (382791339).

1122420021 is a wasteful number, since it uses less digits than its factorization.

1122420021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162835.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1122420021 is about 33502.5375307603. The cubic root of 1122420021 is about 1039.2462551956.

Adding to 1122420021 its reverse (1200242211), we get a palindrome (2322662232).

The spelling of 1122420021 in words is "one billion, one hundred twenty-two million, four hundred twenty thousand, twenty-one".