20101102202121 has 4 divisors (see below), whose sum is σ = 26801469602832. Its totient is φ = 13400734801412.

The previous prime is 20101102202117. The next prime is 20101102202143. The reversal of 20101102202121 is 12120220110102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20101102202121 - 2² = 20101102202117 is a prime.

It is a super-3 number, since 3×20101102202121³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 20101102202121.

It is not an unprimeable number, because it can be changed into a prime (20101102222121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3350183700351 + ... + 3350183700356.

It is an arithmetic number, because the mean of its divisors is an integer number (6700367400708).

Almost surely, 2^{20101102202121} is an apocalyptic number.

It is an amenable number.

20101102202121 is a deficient number, since it is larger than the sum of its proper divisors (6700367400711).

20101102202121 is an equidigital number, since it uses as much as digits as its factorization.

20101102202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6700367400710.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20101102202121 its reverse (12120220110102), we get a palindrome (32221322312223).

The spelling of 20101102202121 in words is "twenty trillion, one hundred one billion, one hundred two million, two hundred two thousand, one hundred twenty-one".