211020002123 has 16 divisors (see below), whose sum is σ = 251719888896. Its totient is φ = 172962952800.

The previous prime is 211020002021. The next prime is 211020002131. The reversal of 211020002123 is 321200020112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 211020002123 - 2¹⁰ = 211020001099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211020002098 and 211020002107.

It is not an unprimeable number, because it can be changed into a prime (211020002183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418790 + ... + 772932.

It is an arithmetic number, because the mean of its divisors is an integer number (15732493056).

Almost surely, 2^211020002123 is an apocalyptic number.

211020002123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

211020002123 is a deficient number, since it is larger than the sum of its proper divisors (40699886773).

211020002123 is a wasteful number, since it uses less digits than its factorization.

211020002123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357874.

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

Adding to 211020002123 its reverse (321200020112), we get a palindrome (532220022235).

The spelling of 211020002123 in words is "two hundred eleven billion, twenty million, two thousand, one hundred twenty-three".