121335421445 has 16 divisors (see below), whose sum is σ = 166421843328. Its totient is φ = 83191942080.

The previous prime is 121335421423. The next prime is 121335421481. The reversal of 121335421445 is 544124533121.

It is not a de Polignac number, because 121335421445 - 2¹⁸ = 121335159301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120767 + ... + 507203.

It is an arithmetic number, because the mean of its divisors is an integer number (10401365208).

Almost surely, 2^121335421445 is an apocalyptic number.

It is an amenable number.

121335421445 is a deficient number, since it is larger than the sum of its proper divisors (45086421883).

121335421445 is an equidigital number, since it uses as much as digits as its factorization.

121335421445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395420.

The product of its digits is 57600, while the sum is 35.

Adding to 121335421445 its reverse (544124533121), we get a palindrome (665459954566).

The spelling of 121335421445 in words is "one hundred twenty-one billion, three hundred thirty-five million, four hundred twenty-one thousand, four hundred forty-five".