1022211011021 has 4 divisors (see below), whose sum is σ = 1023297314844. Its totient is φ = 1021124707200.

The previous prime is 1022211011011. The next prime is 1022211011071. The reversal of 1022211011021 is 1201101122201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 797468646121 + 224742364900 = 893011^2 + 474070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022211011021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022211010987 and 1022211011005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022211011011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 543150500 + ... + 543152381.

It is an arithmetic number, because the mean of its divisors is an integer number (255824328711).

Almost surely, 2^{1022211011021} is an apocalyptic number.

It is an amenable number.

1022211011021 is a deficient number, since it is larger than the sum of its proper divisors (1086303823).

1022211011021 is an equidigital number, since it uses as much as digits as its factorization.

1022211011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086303822.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1022211011021 its reverse (1201101122201), we get a palindrome (2223312133222).

The spelling of 1022211011021 in words is "one trillion, twenty-two billion, two hundred eleven million, eleven thousand, twenty-one".