1222132021 has 4 divisors (see below), whose sum is σ = 1333234944. Its totient is φ = 1111029100.

The previous prime is 1222132019. The next prime is 1222132061. The reversal of 1222132021 is 1202312221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1222132021 - 2¹ = 1222132019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222131986 and 1222132004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222132061) 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, 55551445 + ... + 55551466.

It is an arithmetic number, because the mean of its divisors is an integer number (333308736).

Almost surely, 2^1222132021 is an apocalyptic number.

1222132021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222132021 is a deficient number, since it is larger than the sum of its proper divisors (111102923).

1222132021 is a wasteful number, since it uses less digits than its factorization.

1222132021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111102922.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1222132021 is about 34959.0048628390. The cubic root of 1222132021 is about 1069.1518072136.

Adding to 1222132021 its reverse (1202312221), we get a palindrome (2424444242).

The spelling of 1222132021 in words is "one billion, two hundred twenty-two million, one hundred thirty-two thousand, twenty-one".