10211221012019 has 2 divisors, whose sum is σ = 10211221012020. Its totient is φ = 10211221012018.

The previous prime is 10211221012009. The next prime is 10211221012099. The reversal of 10211221012019 is 91021012211201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10211221012019 - 2²⁸ = 10210952576563 is a prime.

It is a super-2 number, since 2×10211221012019² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10211221011985 and 10211221012003.

It is not a weakly prime, because it can be changed into another prime (10211221012009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105610506009 + 5105610506010.

It is an arithmetic number, because the mean of its divisors is an integer number (5105610506010).

Almost surely, 2^{10211221012019} is an apocalyptic number.

10211221012019 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211221012019 is an equidigital number, since it uses as much as digits as its factorization.

10211221012019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 10211221012019 in words is "ten trillion, two hundred eleven billion, two hundred twenty-one million, twelve thousand, nineteen".