1021222401 has 16 divisors (see below), whose sum is σ = 1378944000. Its totient is φ = 672180608.

The previous prime is 1021222373. The next prime is 1021222403. The reversal of 1021222401 is 1042221201.

It is a cyclic number.

It is not a de Polignac number, because 1021222401 - 2⁶ = 1021222337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021222403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210400 + ... + 215198.

It is an arithmetic number, because the mean of its divisors is an integer number (86184000).

Almost surely, 2^1021222401 is an apocalyptic number.

It is an amenable number.

1021222401 is a deficient number, since it is larger than the sum of its proper divisors (357721599).

1021222401 is an equidigital number, since it uses as much as digits as its factorization.

1021222401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5688.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1021222401 is about 31956.5705450382. The cubic root of 1021222401 is about 1007.0246721020.

Adding to 1021222401 its reverse (1042221201), we get a palindrome (2063443602).

The spelling of 1021222401 in words is "one billion, twenty-one million, two hundred twenty-two thousand, four hundred one".