10211212211989 has 2 divisors, whose sum is σ = 10211212211990. Its totient is φ = 10211212211988.

The previous prime is 10211212211983. The next prime is 10211212212001. The reversal of 10211212211989 is 98911221211201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10198173997764 + 13038214225 = 3193458^2 + 114185^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211212211989 - 2⁷ = 10211212211861 is a prime.

It is a super-2 number, since 2×10211212211989² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10211212211983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105606105994 + 5105606105995.

It is an arithmetic number, because the mean of its divisors is an integer number (5105606105995).

Almost surely, 2^{10211212211989} is an apocalyptic number.

It is an amenable number.

10211212211989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211212211989 is an equidigital number, since it uses as much as digits as its factorization.

10211212211989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 40.

The spelling of 10211212211989 in words is "ten trillion, two hundred eleven billion, two hundred twelve million, two hundred eleven thousand, nine hundred eighty-nine".