20101022121 has 8 divisors (see below), whose sum is σ = 27066723264. Its totient is φ = 13268001200.

The previous prime is 20101022101. The next prime is 20101022129. The reversal of 20101022121 is 12122010102.

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 20101022121 - 2¹¹ = 20101020073 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20101022097 and 20101022106.

It is not an unprimeable number, because it can be changed into a prime (20101022129) 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, 33169701 + ... + 33170306.

It is an arithmetic number, because the mean of its divisors is an integer number (3383340408).

Almost surely, 2^20101022121 is an apocalyptic number.

It is an amenable number.

20101022121 is a deficient number, since it is larger than the sum of its proper divisors (6965701143).

20101022121 is a wasteful number, since it uses less digits than its factorization.

20101022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66340111.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20101022121 its reverse (12122010102), we get a palindrome (32223032223).

The spelling of 20101022121 in words is "twenty billion, one hundred one million, twenty-two thousand, one hundred twenty-one".