1021226620 has 24 divisors (see below), whose sum is σ = 2179735488. Its totient is φ = 401793600.

The previous prime is 1021226593. The next prime is 1021226621. The reversal of 1021226620 is 266221201.

It is a junction number, because it is equal to n+sod(n) for n = 1021226591 and 1021226600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021226621) 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, 417316 + ... + 419755.

It is an arithmetic number, because the mean of its divisors is an integer number (90822312).

Almost surely, 2^1021226620 is an apocalyptic number.

1021226620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021226620 is an abundant number, since it is smaller than the sum of its proper divisors (1158508868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021226620 is a wasteful number, since it uses less digits than its factorization.

1021226620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837141 (or 837139 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1021226620 is about 31956.6365564338. The cubic root of 1021226620 is about 1007.0260588816.

Adding to 1021226620 its reverse (266221201), we get a palindrome (1287447821).

The spelling of 1021226620 in words is "one billion, twenty-one million, two hundred twenty-six thousand, six hundred twenty".