20021010101121 has 8 divisors (see below), whose sum is σ = 26696616130240. Its totient is φ = 13346372069712.

The previous prime is 20021010101101. The next prime is 20021010101149. The reversal of 20021010101121 is 12110101012002.

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

It is not a de Polignac number, because 20021010101121 - 2¹¹ = 20021010099073 is a prime.

It is a super-2 number, since 2×20021010101121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021010101097 and 20021010101106.

It is not an unprimeable number, because it can be changed into a prime (20021010101101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241951165 + ... + 242033898.

It is an arithmetic number, because the mean of its divisors is an integer number (3337077016280).

Almost surely, 2^{20021010101121} is an apocalyptic number.

It is an amenable number.

20021010101121 is a deficient number, since it is larger than the sum of its proper divisors (6675606029119).

20021010101121 is a wasteful number, since it uses less digits than its factorization.

20021010101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483998855.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20021010101121 its reverse (12110101012002), we get a palindrome (32131111113123).

The spelling of 20021010101121 in words is "twenty trillion, twenty-one billion, ten million, one hundred one thousand, one hundred twenty-one".