20123431221122 has 32 divisors (see below), whose sum is σ = 31552901518320. Its totient is φ = 9613093109760.

The previous prime is 20123431221121. The next prime is 20123431221149. The reversal of 20123431221122 is 22112213432102.

It can be written as a sum of positive squares in 8 ways, for example, as 1701300226921 + 18422130994201 = 1304339^2 + 4292101^2 .

It is a super-4 number, since 4×20123431221122⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 20123431221091 and 20123431221100.

It is not an unprimeable number, because it can be changed into a prime (20123431221121) 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, 35846018 + ... + 36403074.

Almost surely, 2^{20123431221122} is an apocalyptic number.

20123431221122 is a deficient number, since it is larger than the sum of its proper divisors (11429470297198).

20123431221122 is a wasteful number, since it uses less digits than its factorization.

20123431221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563606.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 20123431221122 its reverse (22112213432102), we get a palindrome (42235644653224).

The spelling of 20123431221122 in words is "twenty trillion, one hundred twenty-three billion, four hundred thirty-one million, two hundred twenty-one thousand, one hundred twenty-two".