211121020102621 has 2 divisors, whose sum is σ = 211121020102622. Its totient is φ = 211121020102620.

The previous prime is 211121020102607. The next prime is 211121020102627. The reversal of 211121020102621 is 126201020121112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208141647223225 + 2979372879396 = 14427115^2 + 1726086^2 .

It is a cyclic number.

It is not a de Polignac number, because 211121020102621 - 2³⁵ = 211086660364253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211121020102592 and 211121020102601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211121020102627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560510051310 + 105560510051311.

It is an arithmetic number, because the mean of its divisors is an integer number (105560510051311).

Almost surely, 2^{211121020102621} is an apocalyptic number.

It is an amenable number.

211121020102621 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121020102621 is an equidigital number, since it uses as much as digits as its factorization.

211121020102621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 211121020102621 its reverse (126201020121112), we get a palindrome (337322040223733).

The spelling of 211121020102621 in words is "two hundred eleven trillion, one hundred twenty-one billion, twenty million, one hundred two thousand, six hundred twenty-one".