1021120220203 has 4 divisors (see below), whose sum is σ = 1021122427680. Its totient is φ = 1021118012728.

The previous prime is 1021120220173. The next prime is 1021120220207. The reversal of 1021120220203 is 3020220211201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021120220203 is a prime.

It is a super-2 number, since 2×1021120220203² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021120220207) 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, 114100 + ... + 1433617.

It is an arithmetic number, because the mean of its divisors is an integer number (255280606920).

Almost surely, 2^{1021120220203} is an apocalyptic number.

1021120220203 is a deficient number, since it is larger than the sum of its proper divisors (2207477).

1021120220203 is an equidigital number, since it uses as much as digits as its factorization.

1021120220203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207476.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1021120220203 its reverse (3020220211201), we get a palindrome (4041340431404).

The spelling of 1021120220203 in words is "one trillion, twenty-one billion, one hundred twenty million, two hundred twenty thousand, two hundred three".