210011321211123 has 32 divisors (see below), whose sum is σ = 284130962286336. Its totient is φ = 137953432032768.

The previous prime is 210011321211101. The next prime is 210011321211149. The reversal of 210011321211123 is 321112123110012.

It is not a de Polignac number, because 210011321211123 - 2²¹ = 210011319113971 is a prime.

It is a super-2 number, since 2×210011321211123² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 210011321211123.

It is not an unprimeable number, because it can be changed into a prime (210011321211193) 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, 1928016940 + ... + 1928125862.

It is an arithmetic number, because the mean of its divisors is an integer number (8879092571448).

Almost surely, 2^{210011321211123} is an apocalyptic number.

210011321211123 is a deficient number, since it is larger than the sum of its proper divisors (74119641075213).

210011321211123 is a wasteful number, since it uses less digits than its factorization.

210011321211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117603.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 210011321211123 its reverse (321112123110012), we get a palindrome (531123444321135).

The spelling of 210011321211123 in words is "two hundred ten trillion, eleven billion, three hundred twenty-one million, two hundred eleven thousand, one hundred twenty-three".