1222103021 has 4 divisors (see below), whose sum is σ = 1293991452. Its totient is φ = 1150214592.

The previous prime is 1222103011. The next prime is 1222103053. The reversal of 1222103021 is 1203012221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1203012221 = 1667 ⋅721663.

It can be written as a sum of positive squares in 2 ways, for example, as 499030921 + 723072100 = 22339^2 + 26890^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222103021 - 2¹⁰ = 1222101997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222102987 and 1222103005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222103011) 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, 35944190 + ... + 35944223.

It is an arithmetic number, because the mean of its divisors is an integer number (323497863).

Almost surely, 2^1222103021 is an apocalyptic number.

It is an amenable number.

1222103021 is a deficient number, since it is larger than the sum of its proper divisors (71888431).

1222103021 is an equidigital number, since it uses as much as digits as its factorization.

1222103021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71888430.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1222103021 is about 34958.5900888465. The cubic root of 1222103021 is about 1069.1433505038.

Adding to 1222103021 its reverse (1203012221), we get a palindrome (2425115242).

The spelling of 1222103021 in words is "one billion, two hundred twenty-two million, one hundred three thousand, twenty-one".