1001210221111 has 2 divisors, whose sum is σ = 1001210221112. Its totient is φ = 1001210221110.

The previous prime is 1001210221103. The next prime is 1001210221171. The reversal of 1001210221111 is 1111220121001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1001210221111 - 2³ = 1001210221103 is a prime.

It is a super-4 number, since 4×1001210221111⁴ (a number of 49 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1001210221091 and 1001210221100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001210221171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500605110555 + 500605110556.

It is an arithmetic number, because the mean of its divisors is an integer number (500605110556).

Almost surely, 2^{1001210221111} is an apocalyptic number.

1001210221111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001210221111 is an equidigital number, since it uses as much as digits as its factorization.

1001210221111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1001210221111 its reverse (1111220121001), we get a palindrome (2112430342112).

The spelling of 1001210221111 in words is "one trillion, one billion, two hundred ten million, two hundred twenty-one thousand, one hundred eleven".