20011202123 has 8 divisors (see below), whose sum is σ = 21913410816. Its totient is φ = 18122828200.

The previous prime is 20011202111. The next prime is 20011202177. The reversal of 20011202123 is 32120211002.

It is a happy number.

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 20011202123 - 2¹⁰ = 20011201099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20011202098 and 20011202107.

It is not an unprimeable number, because it can be changed into a prime (20011202023) 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, 3455663 + ... + 3461448.

It is an arithmetic number, because the mean of its divisors is an integer number (2739176352).

Almost surely, 2^20011202123 is an apocalyptic number.

20011202123 is a deficient number, since it is larger than the sum of its proper divisors (1902208693).

20011202123 is a wasteful number, since it uses less digits than its factorization.

20011202123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6917385.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20011202123 its reverse (32120211002), we get a palindrome (52131413125).

The spelling of 20011202123 in words is "twenty billion, eleven million, two hundred two thousand, one hundred twenty-three".