20212101211123 has 16 divisors (see below), whose sum is σ = 20515442960896. Its totient is φ = 19910833067520.

The previous prime is 20212101211069. The next prime is 20212101211151. The reversal of 20212101211123 is 32111210121202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20212101211123 is a prime.

It is a super-2 number, since 2×20212101211123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20212101211123.

It is not an unprimeable number, because it can be changed into a prime (20212101271123) 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, 447871186 + ... + 447916312.

It is an arithmetic number, because the mean of its divisors is an integer number (1282215185056).

Almost surely, 2^{20212101211123} is an apocalyptic number.

20212101211123 is a deficient number, since it is larger than the sum of its proper divisors (303341749773).

20212101211123 is a wasteful number, since it uses less digits than its factorization.

20212101211123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67954.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 20212101211123 its reverse (32111210121202), we get a palindrome (52323311332325).

The spelling of 20212101211123 in words is "twenty trillion, two hundred twelve billion, one hundred one million, two hundred eleven thousand, one hundred twenty-three".