2981221505501 has 8 divisors (see below), whose sum is σ = 3090890907000. Its totient is φ = 2872010014720.

The previous prime is 2981221505497. The next prime is 2981221505573. The reversal of 2981221505501 is 1055051221892.

It can be written as a sum of positive squares in 4 ways, for example, as 118607916025 + 2862613589476 = 344395^2 + 1691926^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2981221505501 - 2² = 2981221505497 is a prime.

It is a super-2 number, since 2×2981221505501² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2981221501501) 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 7 ways as a sum of consecutive naturals, for example, 114464420 + ... + 114490461.

It is an arithmetic number, because the mean of its divisors is an integer number (386361363375).

Almost surely, 2^{2981221505501} is an apocalyptic number.

It is an amenable number.

2981221505501 is a deficient number, since it is larger than the sum of its proper divisors (109669401499).

2981221505501 is a wasteful number, since it uses less digits than its factorization.

2981221505501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228955359.

The product of its (nonzero) digits is 72000, while the sum is 41.

The spelling of 2981221505501 in words is "two trillion, nine hundred eighty-one billion, two hundred twenty-one million, five hundred five thousand, five hundred one".