10212110021977 has 2 divisors, whose sum is σ = 10212110021978. Its totient is φ = 10212110021976.

The previous prime is 10212110021947. The next prime is 10212110022019. The reversal of 10212110021977 is 77912001121201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10211705971776 + 404050201 = 3195576^2 + 20101^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10212110021977 is a prime.

It is a super-2 number, since 2×10212110021977² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10212110021947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106055010988 + 5106055010989.

It is an arithmetic number, because the mean of its divisors is an integer number (5106055010989).

Almost surely, 2^{10212110021977} is an apocalyptic number.

It is an amenable number.

10212110021977 is a deficient number, since it is larger than the sum of its proper divisors (1).

10212110021977 is an equidigital number, since it uses as much as digits as its factorization.

10212110021977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 34.

The spelling of 10212110021977 in words is "ten trillion, two hundred twelve billion, one hundred ten million, twenty-one thousand, nine hundred seventy-seven".