20021101121211 has 8 divisors (see below), whose sum is σ = 26694900886800. Its totient is φ = 13347351051552.

The previous prime is 20021101121209. The next prime is 20021101121249. The reversal of 20021101121211 is 11212110112002.

It is a happy number.

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

It is not a de Polignac number, because 20021101121211 - 2¹ = 20021101121209 is a prime.

It is a super-2 number, since 2×20021101121211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20021101121261) 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, 11473560 + ... + 13102853.

It is an arithmetic number, because the mean of its divisors is an integer number (3336862610850).

Almost surely, 2^{20021101121211} is an apocalyptic number.

20021101121211 is a deficient number, since it is larger than the sum of its proper divisors (6673799765589).

20021101121211 is a wasteful number, since it uses less digits than its factorization.

20021101121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24847965.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20021101121211 its reverse (11212110112002), we get a palindrome (31233211233213).

The spelling of 20021101121211 in words is "twenty trillion, twenty-one billion, one hundred one million, one hundred twenty-one thousand, two hundred eleven".