1020001122211 has 4 divisors (see below), whose sum is σ = 1021768889032. Its totient is φ = 1018233355392.

The previous prime is 1020001122163. The next prime is 1020001122227. The reversal of 1020001122211 is 1122211000201.

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 1020001122211 - 2¹⁹ = 1020000597923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020001122191 and 1020001122200.

It is not an unprimeable number, because it can be changed into a prime (1020001122011) 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, 883882545 + ... + 883883698.

It is an arithmetic number, because the mean of its divisors is an integer number (255442222258).

Almost surely, 2^{1020001122211} is an apocalyptic number.

1020001122211 is a deficient number, since it is larger than the sum of its proper divisors (1767766821).

1020001122211 is an equidigital number, since it uses as much as digits as its factorization.

1020001122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767766820.

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

Adding to 1020001122211 its reverse (1122211000201), we get a palindrome (2142212122412).

The spelling of 1020001122211 in words is "one trillion, twenty billion, one million, one hundred twenty-two thousand, two hundred eleven".