155116641221210 has 16 divisors (see below), whose sum is σ = 295634069151336. Its totient is φ = 58396853165568.

The previous prime is 155116641221137. The next prime is 155116641221231. The reversal of 155116641221210 is 12122146611551.

It can be written as a sum of positive squares in 4 ways, for example, as 150771213305449 + 4345427915761 = 12278893^2 + 2084569^2 .

It is a super-2 number, since 2×155116641221210² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 456225415187 + ... + 456225415526.

Almost surely, 2^{155116641221210} is an apocalyptic number.

155116641221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155116641221210 is a deficient number, since it is larger than the sum of its proper divisors (140517427930126).

155116641221210 is a wasteful number, since it uses less digits than its factorization.

155116641221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912450830737.

The product of its (nonzero) digits is 28800, while the sum is 38.

Adding to 155116641221210 its reverse (12122146611551), we get a palindrome (167238787832761).

The spelling of 155116641221210 in words is "one hundred fifty-five trillion, one hundred sixteen billion, six hundred forty-one million, two hundred twenty-one thousand, two hundred ten".