210021201123 has 16 divisors (see below), whose sum is σ = 287976631200. Its totient is φ = 136049953536.

The previous prime is 210021201101. The next prime is 210021201139. The reversal of 210021201123 is 321102120012.

It is not a de Polignac number, because 210021201123 - 2⁶ = 210021201059 is a prime.

It is a super-2 number, since 2×210021201123² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (210021201023) 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, 1165698 + ... + 1333751.

It is an arithmetic number, because the mean of its divisors is an integer number (17998539450).

Almost surely, 2^210021201123 is an apocalyptic number.

210021201123 is a deficient number, since it is larger than the sum of its proper divisors (77955430077).

210021201123 is a wasteful number, since it uses less digits than its factorization.

210021201123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2500246.

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

Adding to 210021201123 its reverse (321102120012), we get a palindrome (531123321135).

The spelling of 210021201123 in words is "two hundred ten billion, twenty-one million, two hundred one thousand, one hundred twenty-three".