1021122421 has 8 divisors (see below), whose sum is σ = 1162384704. Its totient is φ = 887932320.

The previous prime is 1021122413. The next prime is 1021122457. The reversal of 1021122421 is 1242211201.

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

It is not a de Polignac number, because 1021122421 - 2³ = 1021122413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021122395 and 1021122404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021122461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2017776 + ... + 2018281.

It is an arithmetic number, because the mean of its divisors is an integer number (145298088).

Almost surely, 2^1021122421 is an apocalyptic number.

1021122421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021122421 is a deficient number, since it is larger than the sum of its proper divisors (141262283).

1021122421 is a wasteful number, since it uses less digits than its factorization.

1021122421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4036091.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1021122421 is about 31955.0061962128. The cubic root of 1021122421 is about 1006.9918076928.

Adding to 1021122421 its reverse (1242211201), we get a palindrome (2263333622).

The spelling of 1021122421 in words is "one billion, twenty-one million, one hundred twenty-two thousand, four hundred twenty-one".