20210111020121 has 8 divisors (see below), whose sum is σ = 22179414164544. Its totient is φ = 18262811263120.

The previous prime is 20210111020079. The next prime is 20210111020123. The reversal of 20210111020121 is 12102011101202.

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

It is a cyclic number.

It is not a de Polignac number, because 20210111020121 - 2¹⁰ = 20210111019097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20210111020096 and 20210111020105.

It is not an unprimeable number, because it can be changed into a prime (20210111020123) 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, 5500844930 + ... + 5500848603.

It is an arithmetic number, because the mean of its divisors is an integer number (2772426770568).

Almost surely, 2^{20210111020121} is an apocalyptic number.

It is an amenable number.

20210111020121 is a deficient number, since it is larger than the sum of its proper divisors (1969303144423).

20210111020121 is a wasteful number, since it uses less digits than its factorization.

20210111020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11001693711.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20210111020121 its reverse (12102011101202), we get a palindrome (32312122121323).

The spelling of 20210111020121 in words is "twenty trillion, two hundred ten billion, one hundred eleven million, twenty thousand, one hundred twenty-one".