1011022421 has 4 divisors (see below), whose sum is σ = 1011126144. Its totient is φ = 1010918700.

The previous prime is 1011022409. The next prime is 1011022469. The reversal of 1011022421 is 1242201101.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1242201101 = 17 ⋅73070653.

It is a cyclic number.

It is not a de Polignac number, because 1011022421 - 2¹⁴ = 1011006037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011022396 and 1011022405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011022721) 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, 35525 + ... + 57306.

It is an arithmetic number, because the mean of its divisors is an integer number (252781536).

Almost surely, 2^1011022421 is an apocalyptic number.

It is an amenable number.

1011022421 is a deficient number, since it is larger than the sum of its proper divisors (103723).

1011022421 is an equidigital number, since it uses as much as digits as its factorization.

1011022421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103722.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1011022421 is about 31796.5787625021. The cubic root of 1011022421 is about 1003.6607230875.

Adding to 1011022421 its reverse (1242201101), we get a palindrome (2253223522).

The spelling of 1011022421 in words is "one billion, eleven million, twenty-two thousand, four hundred twenty-one".