20102123211 has 8 divisors (see below), whose sum is σ = 27968171520. Its totient is φ = 12818745192.

The previous prime is 20102123201. The next prime is 20102123219. The reversal of 20102123211 is 11232120102.

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

It is not a de Polignac number, because 20102123211 - 2⁹ = 20102122699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20102123219) 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, 145667491 + ... + 145667628.

It is an arithmetic number, because the mean of its divisors is an integer number (3496021440).

Almost surely, 2^20102123211 is an apocalyptic number.

20102123211 is a deficient number, since it is larger than the sum of its proper divisors (7866048309).

20102123211 is a wasteful number, since it uses less digits than its factorization.

20102123211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291335145.

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

Adding to 20102123211 its reverse (11232120102), we get a palindrome (31334243313).

The spelling of 20102123211 in words is "twenty billion, one hundred two million, one hundred twenty-three thousand, two hundred eleven".