1000211212221 has 8 divisors (see below), whose sum is σ = 1436200715040. Its totient is φ = 615514592112.

The previous prime is 1000211212219. The next prime is 1000211212223. The reversal of 1000211212221 is 1222121120001.

It is an interprime number because it is at equal distance from previous prime (1000211212219) and next prime (1000211212223).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1000211212221 - 2¹ = 1000211212219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000211212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000211212223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12823220631 + ... + 12823220708.

It is an arithmetic number, because the mean of its divisors is an integer number (179525089380).

Almost surely, 2^{1000211212221} is an apocalyptic number.

It is an amenable number.

1000211212221 is a deficient number, since it is larger than the sum of its proper divisors (435989502819).

1000211212221 is a wasteful number, since it uses less digits than its factorization.

1000211212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25646441355.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1000211212221 its reverse (1222121120001), we get a palindrome (2222332332222).

The spelling of 1000211212221 in words is "one trillion, two hundred eleven million, two hundred twelve thousand, two hundred twenty-one".