20021001222111 has 8 divisors (see below), whose sum is σ = 26694926701824. Its totient is φ = 13347204945240.

The previous prime is 20021001222107. The next prime is 20021001222119. The reversal of 20021001222111 is 11122210012002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20021001222111 - 2² = 20021001222107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021001222119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31938561 + ... + 32559386.

It is an arithmetic number, because the mean of its divisors is an integer number (3336865837728).

Almost surely, 2^{20021001222111} is an apocalyptic number.

20021001222111 is a deficient number, since it is larger than the sum of its proper divisors (6673925479713).

20021001222111 is a wasteful number, since it uses less digits than its factorization.

20021001222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64601421.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20021001222111 its reverse (11122210012002), we get a palindrome (31143211234113).

The spelling of 20021001222111 in words is "twenty trillion, twenty-one billion, one million, two hundred twenty-two thousand, one hundred eleven".