2100100220987 has 2 divisors, whose sum is σ = 2100100220988. Its totient is φ = 2100100220986.

The previous prime is 2100100220923. The next prime is 2100100221013. The reversal of 2100100220987 is 7890220010012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2100100220987 - 2⁶ = 2100100220923 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100100220087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050050110493 + 1050050110494.

It is an arithmetic number, because the mean of its divisors is an integer number (1050050110494).

Almost surely, 2^{2100100220987} is an apocalyptic number.

2100100220987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100100220987 is an equidigital number, since it uses as much as digits as its factorization.

2100100220987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

Adding to 2100100220987 its reverse (7890220010012), we get a palindrome (9990320230999).

The spelling of 2100100220987 in words is "two trillion, one hundred billion, one hundred million, two hundred twenty thousand, nine hundred eighty-seven".