2011155151220 has 48 divisors (see below), whose sum is σ = 4404610495488. Its totient is φ = 770485754880.

The previous prime is 2011155151219. The next prime is 2011155151231. The reversal of 2011155151220 is 221515511102.

It is a self number, because there is not a number n which added to its sum of digits gives 2011155151220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16660472 + ... + 16780751.

It is an arithmetic number, because the mean of its divisors is an integer number (91762718656).

Almost surely, 2^{2011155151220} is an apocalyptic number.

2011155151220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011155151220 is an abundant number, since it is smaller than the sum of its proper divisors (2393455344268).

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

2011155151220 is a wasteful number, since it uses less digits than its factorization.

2011155151220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33441360 (or 33441358 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 26.

The spelling of 2011155151220 in words is "two trillion, eleven billion, one hundred fifty-five million, one hundred fifty-one thousand, two hundred twenty".