20021011001222 has 64 divisors (see below), whose sum is σ = 38058950642688. Its totient is φ = 7671861648000.

The previous prime is 20021011001219. The next prime is 20021011001249. The reversal of 20021011001222 is 22210011012002.

It is a super-2 number, since 2×20021011001222² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20021011001197 and 20021011001206.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 117725183 + ... + 117895125.

It is an arithmetic number, because the mean of its divisors is an integer number (594671103792).

Almost surely, 2^{20021011001222} is an apocalyptic number.

20021011001222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20021011001222 is a deficient number, since it is larger than the sum of its proper divisors (18037939641466).

20021011001222 is a wasteful number, since it uses less digits than its factorization.

20021011001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182565.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20021011001222 its reverse (22210011012002), we get a palindrome (42231022013224).

The spelling of 20021011001222 in words is "twenty trillion, twenty-one billion, eleven million, one thousand, two hundred twenty-two".