1012401221 has 16 divisors (see below), whose sum is σ = 1159075008. Its totient is φ = 876000000.

The previous prime is 1012401217. The next prime is 1012401259. The reversal of 1012401221 is 1221042101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1012401221 - 2² = 1012401217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012401196 and 1012401205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012401121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46346 + ... + 64596.

It is an arithmetic number, because the mean of its divisors is an integer number (72442188).

Almost surely, 2^1012401221 is an apocalyptic number.

It is an amenable number.

1012401221 is a deficient number, since it is larger than the sum of its proper divisors (146673787).

1012401221 is a wasteful number, since it uses less digits than its factorization.

1012401221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18532.

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

The square root of 1012401221 is about 31818.2529532971. The cubic root of 1012401221 is about 1004.1167692873.

Adding to 1012401221 its reverse (1221042101), we get a palindrome (2233443322).

The spelling of 1012401221 in words is "one billion, twelve million, four hundred one thousand, two hundred twenty-one".