211221203002123 has 16 divisors (see below), whose sum is σ = 212337025225920. Its totient is φ = 210107150239104.

The previous prime is 211221203002087. The next prime is 211221203002133. The reversal of 211221203002123 is 321200302122112.

It is a cyclic number.

It is not a de Polignac number, because 211221203002123 - 2⁴⁵ = 176036830913291 is a prime.

It is a super-2 number, since 2×211221203002123² (a number of 29 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 = 211221203002094 and 211221203002103.

It is not an unprimeable number, because it can be changed into a prime (211221203002133) 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, 1130804565 + ... + 1130991337.

It is an arithmetic number, because the mean of its divisors is an integer number (13271064076620).

Almost surely, 2^{211221203002123} is an apocalyptic number.

211221203002123 is a deficient number, since it is larger than the sum of its proper divisors (1115822223797).

211221203002123 is a wasteful number, since it uses less digits than its factorization.

211221203002123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191478.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 211221203002123 its reverse (321200302122112), we get a palindrome (532421505124235).

The spelling of 211221203002123 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred three million, two thousand, one hundred twenty-three".