200021211123 has 32 divisors (see below), whose sum is σ = 282844323840. Its totient is φ = 125511223680.

The previous prime is 200021211113. The next prime is 200021211127. The reversal of 200021211123 is 321112120002.

It is not a de Polignac number, because 200021211123 - 2⁸ = 200021210867 is a prime.

It is a super-2 number, since 2×200021211123² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (200021211127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10723161 + ... + 10741797.

It is an arithmetic number, because the mean of its divisors is an integer number (8838885120).

Almost surely, 2^200021211123 is an apocalyptic number.

200021211123 is a deficient number, since it is larger than the sum of its proper divisors (82823112717).

200021211123 is a wasteful number, since it uses less digits than its factorization.

200021211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21827.

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

Adding to 200021211123 its reverse (321112120002), we get a palindrome (521133331125).

The spelling of 200021211123 in words is "two hundred billion, twenty-one million, two hundred eleven thousand, one hundred twenty-three".