20102216123 has 8 divisors (see below), whose sum is σ = 21936201840. Its totient is φ = 18269315680.

The previous prime is 20102216111. The next prime is 20102216137. The reversal of 20102216123 is 32161220102.

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

It is not a de Polignac number, because 20102216123 - 2⁶ = 20102216059 is a prime.

It is a super-2 number, since 2×20102216123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102216095 and 20102216104.

It is not an unprimeable number, because it can be changed into a prime (20102216023) 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, 232340 + ... + 306897.

It is an arithmetic number, because the mean of its divisors is an integer number (2742025230).

Almost surely, 2^20102216123 is an apocalyptic number.

20102216123 is a deficient number, since it is larger than the sum of its proper divisors (1833985717).

20102216123 is a wasteful number, since it uses less digits than its factorization.

20102216123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542637.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20102216123 its reverse (32161220102), we get a palindrome (52263436225).

The spelling of 20102216123 in words is "twenty billion, one hundred two million, two hundred sixteen thousand, one hundred twenty-three".