10211121019877 has 2 divisors, whose sum is σ = 10211121019878. Its totient is φ = 10211121019876.

The previous prime is 10211121019873. The next prime is 10211121019951. The reversal of 10211121019877 is 77891012111201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8227752980836 + 1983368039041 = 2868406^2 + 1408321^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211121019877 - 2² = 10211121019873 is a prime.

It is a super-4 number, since 4×10211121019877⁴ (a number of 53 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10211121019873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105560509938 + 5105560509939.

It is an arithmetic number, because the mean of its divisors is an integer number (5105560509939).

Almost surely, 2^{10211121019877} is an apocalyptic number.

It is an amenable number.

10211121019877 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211121019877 is an equidigital number, since it uses as much as digits as its factorization.

10211121019877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 41.

The spelling of 10211121019877 in words is "ten trillion, two hundred eleven billion, one hundred twenty-one million, nineteen thousand, eight hundred seventy-seven".