20121401432121 has 64 divisors (see below), whose sum is σ = 30636432230400. Its totient is φ = 11627764797440.

The previous prime is 20121401432063. The next prime is 20121401432159. The reversal of 20121401432121 is 12123410412102.

It is not a de Polignac number, because 20121401432121 - 2⁹ = 20121401431609 is a prime.

It is a super-4 number, since 4×20121401432121⁴ (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 = 20121401432091 and 20121401432100.

It is not an unprimeable number, because it can be changed into a prime (20121401432021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1230733855 + ... + 1230750203.

It is an arithmetic number, because the mean of its divisors is an integer number (478694253600).

Almost surely, 2^{20121401432121} is an apocalyptic number.

It is an amenable number.

20121401432121 is a deficient number, since it is larger than the sum of its proper divisors (10515030798279).

20121401432121 is a wasteful number, since it uses less digits than its factorization.

20121401432121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21406.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 20121401432121 its reverse (12123410412102), we get a palindrome (32244811844223).

The spelling of 20121401432121 in words is "twenty trillion, one hundred twenty-one billion, four hundred one million, four hundred thirty-two thousand, one hundred twenty-one".