1000122355155 has 128 divisors (see below), whose sum is σ = 2024884832256. Its totient is φ = 409433702400.

The previous prime is 1000122355097. The next prime is 1000122355213. The reversal of 1000122355155 is 5515532210001.

It is an interprime number because it is at equal distance from previous prime (1000122355097) and next prime (1000122355213).

It is not a de Polignac number, because 1000122355155 - 2²¹ = 1000120258003 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 72251035 + ... + 72264875.

It is an arithmetic number, because the mean of its divisors is an integer number (15819412752).

Almost surely, 2^{1000122355155} is an apocalyptic number.

1000122355155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1000122355155 is an abundant number, since it is smaller than the sum of its proper divisors (1024762477101).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1000122355155 is a wasteful number, since it uses less digits than its factorization.

1000122355155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14797.

The product of its (nonzero) digits is 7500, while the sum is 30.

Adding to 1000122355155 its reverse (5515532210001), we get a palindrome (6515654565156).

The spelling of 1000122355155 in words is "one trillion, one hundred twenty-two million, three hundred fifty-five thousand, one hundred fifty-five".