121420435231 has 8 divisors (see below), whose sum is σ = 129810998304. Its totient is φ = 113168559360.

The previous prime is 121420435207. The next prime is 121420435243. The reversal of 121420435231 is 132534024121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121420435231 - 2¹⁹ = 121419910943 is a prime.

It is a super-2 number, since 2×121420435231² (a number of 23 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 121420435231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121420435831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34669990 + ... + 34673491.

It is an arithmetic number, because the mean of its divisors is an integer number (16226374788).

Almost surely, 2^121420435231 is an apocalyptic number.

121420435231 is a deficient number, since it is larger than the sum of its proper divisors (8390563073).

121420435231 is a wasteful number, since it uses less digits than its factorization.

121420435231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69343601.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 121420435231 its reverse (132534024121), we get a palindrome (253954459352).

The spelling of 121420435231 in words is "one hundred twenty-one billion, four hundred twenty million, four hundred thirty-five thousand, two hundred thirty-one".