20102213121 has 8 divisors (see below), whose sum is σ = 27456681504. Its totient is φ = 13074610080.

The previous prime is 20102213119. The next prime is 20102213149. The reversal of 20102213121 is 12131220102.

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

It is not a de Polignac number, because 20102213121 - 2¹ = 20102213119 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 20102213121.

It is not an unprimeable number, because it can be changed into a prime (20102213321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81716191 + ... + 81716436.

It is an arithmetic number, because the mean of its divisors is an integer number (3432085188).

Almost surely, 2^20102213121 is an apocalyptic number.

It is an amenable number.

20102213121 is a deficient number, since it is larger than the sum of its proper divisors (7354468383).

20102213121 is a wasteful number, since it uses less digits than its factorization.

20102213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163432671.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20102213121 its reverse (12131220102), we get a palindrome (32233433223).

The spelling of 20102213121 in words is "twenty billion, one hundred two million, two hundred thirteen thousand, one hundred twenty-one".