121203143143431 has 16 divisors (see below), whose sum is σ = 163359384131328. Its totient is φ = 79925408697600.

The previous prime is 121203143143351. The next prime is 121203143143441. The reversal of 121203143143431 is 134341341302121.

It is a happy number.

It is not a de Polignac number, because 121203143143431 - 2¹⁰ = 121203143142407 is a prime.

It is a super-2 number, since 2×121203143143431² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121203143143392 and 121203143143401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121203143143441) 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, 113204385 + ... + 114270026.

It is an arithmetic number, because the mean of its divisors is an integer number (10209961508208).

Almost surely, 2^{121203143143431} is an apocalyptic number.

121203143143431 is a deficient number, since it is larger than the sum of its proper divisors (42156240987897).

121203143143431 is a wasteful number, since it uses less digits than its factorization.

121203143143431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227476342.

The product of its (nonzero) digits is 20736, while the sum is 33.

Adding to 121203143143431 its reverse (134341341302121), we get a palindrome (255544484445552).

The spelling of 121203143143431 in words is "one hundred twenty-one trillion, two hundred three billion, one hundred forty-three million, one hundred forty-three thousand, four hundred thirty-one".