2100212100987 has 64 divisors (see below), whose sum is σ = 3760180171776. Its totient is φ = 1006998312960.

The previous prime is 2100212100967. The next prime is 2100212101051. The reversal of 2100212100987 is 7890012120012.

It is not a de Polignac number, because 2100212100987 - 2¹² = 2100212096891 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (2100212100967) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38870863 + ... + 38924855.

It is an arithmetic number, because the mean of its divisors is an integer number (58752815184).

Almost surely, 2^{2100212100987} is an apocalyptic number.

2100212100987 is a deficient number, since it is larger than the sum of its proper divisors (1659968070789).

2100212100987 is a wasteful number, since it uses less digits than its factorization.

2100212100987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66980.

The product of its (nonzero) digits is 4032, while the sum is 33.

Adding to 2100212100987 its reverse (7890012120012), we get a palindrome (9990224220999).

The spelling of 2100212100987 in words is "two trillion, one hundred billion, two hundred twelve million, one hundred thousand, nine hundred eighty-seven".