121220133742045 has 32 divisors (see below), whose sum is σ = 164937350148480. Its totient is φ = 84785110352640.

The previous prime is 121220133742039. The next prime is 121220133742051. The reversal of 121220133742045 is 540247331022121.

It is an interprime number because it is at equal distance from previous prime (121220133742039) and next prime (121220133742051).

It is not a de Polignac number, because 121220133742045 - 2¹⁵ = 121220133709277 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121220133741995 and 121220133742013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6255379 + ... + 16780048.

It is an arithmetic number, because the mean of its divisors is an integer number (5154292192140).

Almost surely, 2^{121220133742045} is an apocalyptic number.

It is an amenable number.

121220133742045 is a deficient number, since it is larger than the sum of its proper divisors (43717216406435).

121220133742045 is a wasteful number, since it uses less digits than its factorization.

121220133742045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23039725.

The product of its (nonzero) digits is 80640, while the sum is 37.

Adding to 121220133742045 its reverse (540247331022121), we get a palindrome (661467464764166).

The spelling of 121220133742045 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred thirty-three million, seven hundred forty-two thousand, forty-five".