2100012211897 has 2 divisors, whose sum is σ = 2100012211898. Its totient is φ = 2100012211896.

The previous prime is 2100012211889. The next prime is 2100012212027. The reversal of 2100012211897 is 7981122100012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1822294805776 + 277717406121 = 1349924^2 + 526989^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100012211897 - 2³ = 2100012211889 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100012212897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050006105948 + 1050006105949.

It is an arithmetic number, because the mean of its divisors is an integer number (1050006105949).

Almost surely, 2^{2100012211897} is an apocalyptic number.

It is an amenable number.

2100012211897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100012211897 is an equidigital number, since it uses as much as digits as its factorization.

2100012211897 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 34.

The spelling of 2100012211897 in words is "two trillion, one hundred billion, twelve million, two hundred eleven thousand, eight hundred ninety-seven".