20102121101 has 8 divisors (see below), whose sum is σ = 20293039680. Its totient is φ = 19911431232.

The previous prime is 20102121097. The next prime is 20102121113. The reversal of 20102121101 is 10112120102.

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 20102121101 - 2² = 20102121097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102121181) 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, 122096 + ... + 234758.

It is an arithmetic number, because the mean of its divisors is an integer number (2536629960).

Almost surely, 2^20102121101 is an apocalyptic number.

It is an amenable number.

20102121101 is a deficient number, since it is larger than the sum of its proper divisors (190918579).

20102121101 is a wasteful number, since it uses less digits than its factorization.

20102121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114355.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20102121101 its reverse (10112120102), we get a palindrome (30214241203).

Subtracting from 20102121101 its reverse (10112120102), we obtain a palindrome (9990000999).

The spelling of 20102121101 in words is "twenty billion, one hundred two million, one hundred twenty-one thousand, one hundred one".