1020200121211 has 4 divisors (see below), whose sum is σ = 1036924713424. Its totient is φ = 1003475529000.

The previous prime is 1020200121197. The next prime is 1020200121251. The reversal of 1020200121211 is 1121210020201.

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 1020200121211 - 2¹¹ = 1020200119163 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020200121191 and 1020200121200.

It is not an unprimeable number, because it can be changed into a prime (1020200121251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8362296015 + ... + 8362296136.

It is an arithmetic number, because the mean of its divisors is an integer number (259231178356).

Almost surely, 2^{1020200121211} is an apocalyptic number.

1020200121211 is a deficient number, since it is larger than the sum of its proper divisors (16724592213).

1020200121211 is an equidigital number, since it uses as much as digits as its factorization.

1020200121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16724592212.

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

Adding to 1020200121211 its reverse (1121210020201), we get a palindrome (2141410141412).

It can be divided in two parts, 1020200 and 121211, that added together give a palindrome (1141411).

The spelling of 1020200121211 in words is "one trillion, twenty billion, two hundred million, one hundred twenty-one thousand, two hundred eleven".