2101211100987 has 8 divisors (see below), whose sum is σ = 2802011827536. Its totient is φ = 1400608887552.

The previous prime is 2101211100931. The next prime is 2101211101013. The reversal of 2101211100987 is 7890011121012.

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

It is not a de Polignac number, because 2101211100987 - 2¹² = 2101211096891 is a prime.

It is a super-2 number, since 2×2101211100987² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2101219100987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49603578 + ... + 49645919.

It is an arithmetic number, because the mean of its divisors is an integer number (350251478442).

Almost surely, 2^{2101211100987} is an apocalyptic number.

2101211100987 is a deficient number, since it is larger than the sum of its proper divisors (700800726549).

2101211100987 is an equidigital number, since it uses as much as digits as its factorization.

2101211100987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99256557.

The product of its (nonzero) digits is 2016, while the sum is 33.

Adding to 2101211100987 its reverse (7890011121012), we get a palindrome (9991222221999).

The spelling of 2101211100987 in words is "two trillion, one hundred one billion, two hundred eleven million, one hundred thousand, nine hundred eighty-seven".