20210102111121 has 8 divisors (see below), whose sum is σ = 29019633800640. Its totient is φ = 12436985914512.

The previous prime is 20210102111107. The next prime is 20210102111131. The reversal of 20210102111121 is 12111120101202.

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 20210102111121 - 2¹³ = 20210102102929 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20210102111121.

It is not an unprimeable number, because it can be changed into a prime (20210102111131) 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, 259103873181 + ... + 259103873258.

It is an arithmetic number, because the mean of its divisors is an integer number (3627454225080).

Almost surely, 2^{20210102111121} is an apocalyptic number.

It is an amenable number.

20210102111121 is a deficient number, since it is larger than the sum of its proper divisors (8809531689519).

20210102111121 is a wasteful number, since it uses less digits than its factorization.

20210102111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518207746455.

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

Adding to 20210102111121 its reverse (12111120101202), we get a palindrome (32321222212323).

The spelling of 20210102111121 in words is "twenty trillion, two hundred ten billion, one hundred two million, one hundred eleven thousand, one hundred twenty-one".