155240212211101 has 16 divisors (see below), whose sum is σ = 158771415718080. Its totient is φ = 151744888563840.

The previous prime is 155240212211027. The next prime is 155240212211141. The reversal of 155240212211101 is 101112212042551.

It is a cyclic number.

It is not a de Polignac number, because 155240212211101 - 2⁷ = 155240212210973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155240212211101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155240212211141) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 122325715 + ... + 123588271.

It is an arithmetic number, because the mean of its divisors is an integer number (9923213482380).

Almost surely, 2^{155240212211101} is an apocalyptic number.

It is an amenable number.

155240212211101 is a deficient number, since it is larger than the sum of its proper divisors (3531203506979).

155240212211101 is a wasteful number, since it uses less digits than its factorization.

155240212211101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276764.

The product of its (nonzero) digits is 1600, while the sum is 28.

Adding to 155240212211101 its reverse (101112212042551), we get a palindrome (256352424253652).

The spelling of 155240212211101 in words is "one hundred fifty-five trillion, two hundred forty billion, two hundred twelve million, two hundred eleven thousand, one hundred one".