1000211221201 has 4 divisors (see below), whose sum is σ = 1000228623472. Its totient is φ = 1000193818932.

The previous prime is 1000211221157. The next prime is 1000211221231. The reversal of 1000211221201 is 1021221120001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1000211221201 - 2²⁷ = 1000077003473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000211221231) 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, 8614635 + ... + 8729968.

It is an arithmetic number, because the mean of its divisors is an integer number (250057155868).

Almost surely, 2^{1000211221201} is an apocalyptic number.

It is an amenable number.

1000211221201 is a deficient number, since it is larger than the sum of its proper divisors (17402271).

1000211221201 is an equidigital number, since it uses as much as digits as its factorization.

1000211221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17402270.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1000211221201 its reverse (1021221120001), we get a palindrome (2021432341202).

The spelling of 1000211221201 in words is "one trillion, two hundred eleven million, two hundred twenty-one thousand, two hundred one".