1000212421291 has 4 divisors (see below), whose sum is σ = 1027245189472. Its totient is φ = 973179653112.

The previous prime is 1000212421289. The next prime is 1000212421301. The reversal of 1000212421291 is 1921242120001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1000212421291 - 2¹ = 1000212421289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000212421391) 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, 13516384035 + ... + 13516384108.

It is an arithmetic number, because the mean of its divisors is an integer number (256811297368).

Almost surely, 2^{1000212421291} is an apocalyptic number.

1000212421291 is a deficient number, since it is larger than the sum of its proper divisors (27032768181).

1000212421291 is an equidigital number, since it uses as much as digits as its factorization.

1000212421291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27032768180.

The product of its (nonzero) digits is 576, while the sum is 25.

Adding to 1000212421291 its reverse (1921242120001), we get a palindrome (2921454541292).

The spelling of 1000212421291 in words is "one trillion, two hundred twelve million, four hundred twenty-one thousand, two hundred ninety-one".