1226021021 has 8 divisors (see below), whose sum is σ = 1238028000. Its totient is φ = 1214064720.

The previous prime is 1226020979. The next prime is 1226021053. The reversal of 1226021021 is 1201206221.

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

It is a cyclic number.

It is not a de Polignac number, because 1226021021 - 2¹⁰ = 1226019997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226021921) 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, 36890 + ... + 61748.

It is an arithmetic number, because the mean of its divisors is an integer number (154753500).

Almost surely, 2^1226021021 is an apocalyptic number.

It is an amenable number.

1226021021 is a deficient number, since it is larger than the sum of its proper divisors (12006979).

1226021021 is a wasteful number, since it uses less digits than its factorization.

1226021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25339.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1226021021 is about 35014.5829762401. The cubic root of 1226021021 is about 1070.2846713965.

Adding to 1226021021 its reverse (1201206221), we get a palindrome (2427227242).

The spelling of 1226021021 in words is "one billion, two hundred twenty-six million, twenty-one thousand, twenty-one".