220121450340155 has 48 divisors (see below), whose sum is σ = 334861623077184. Its totient is φ = 135931337717760.

The previous prime is 220121450340151. The next prime is 220121450340257. The reversal of 220121450340155 is 551043054121022.

It is not a de Polignac number, because 220121450340155 - 2² = 220121450340151 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (220121450340151) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 453588074 + ... + 454073103.

It is an arithmetic number, because the mean of its divisors is an integer number (6976283814108).

Almost surely, 2^{220121450340155} is an apocalyptic number.

220121450340155 is a deficient number, since it is larger than the sum of its proper divisors (114740172737029).

220121450340155 is a wasteful number, since it uses less digits than its factorization.

220121450340155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907661256 (or 907661243 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 220121450340155 in words is "two hundred twenty trillion, one hundred twenty-one billion, four hundred fifty million, three hundred forty thousand, one hundred fifty-five".