33100012155 has 16 divisors (see below), whose sum is σ = 60525736704. Its totient is φ = 15131434080.

The previous prime is 33100012139. The next prime is 33100012201. The reversal of 33100012155 is 55121000133.

It is not a de Polignac number, because 33100012155 - 2⁴ = 33100012139 is a prime.

It is a super-2 number, since 2×33100012155² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157619001 + ... + 157619210.

It is an arithmetic number, because the mean of its divisors is an integer number (3782858544).

Almost surely, 2^33100012155 is an apocalyptic number.

33100012155 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

33100012155 is a deficient number, since it is larger than the sum of its proper divisors (27425724549).

33100012155 is a wasteful number, since it uses less digits than its factorization.

33100012155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315238226.

The product of its (nonzero) digits is 450, while the sum is 21.

Adding to 33100012155 its reverse (55121000133), we get a palindrome (88221012288).

The spelling of 33100012155 in words is "thirty-three billion, one hundred million, twelve thousand, one hundred fifty-five".