1421025007221 has 8 divisors (see below), whose sum is σ = 2105222232960. Its totient is φ = 947350004796.

The previous prime is 1421025007163. The next prime is 1421025007247. The reversal of 1421025007221 is 1227005201241.

It is a happy number.

1421025007221 is a `hidden beast` number, since 142 + 10 + 2 + 500 + 7 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 1421025007221 - 2²² = 1421020812917 is a prime.

It is a super-2 number, since 2×1421025007221² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 52630555823 = 1421025007221 / (1 + 4 + 2 + 1 + 0 + 2 + 5 + 0 + 0 + 7 + 2 + 2 + 1).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421025007121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26315277885 + ... + 26315277938.

It is an arithmetic number, because the mean of its divisors is an integer number (263152779120).

Almost surely, 2^{1421025007221} is an apocalyptic number.

It is an amenable number.

1421025007221 is a deficient number, since it is larger than the sum of its proper divisors (684197225739).

1421025007221 is an equidigital number, since it uses as much as digits as its factorization.

1421025007221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52630555832 (or 52630555826 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The spelling of 1421025007221 in words is "one trillion, four hundred twenty-one billion, twenty-five million, seven thousand, two hundred twenty-one".