212021012153 has 2 divisors, whose sum is σ = 212021012154. Its totient is φ = 212021012152.

The previous prime is 212021012089. The next prime is 212021012167. The reversal of 212021012153 is 351210120212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166878786064 + 45142226089 = 408508^2 + 212467^2 .

It is a cyclic number.

It is not a de Polignac number, because 212021012153 - 2⁶ = 212021012089 is a prime.

It is not a weakly prime, because it can be changed into another prime (212021012183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010506076 + 106010506077.

It is an arithmetic number, because the mean of its divisors is an integer number (106010506077).

Almost surely, 2^212021012153 is an apocalyptic number.

It is an amenable number.

212021012153 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021012153 is an equidigital number, since it uses as much as digits as its factorization.

212021012153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 212021012153 its reverse (351210120212), we get a palindrome (563231132365).

The spelling of 212021012153 in words is "two hundred twelve billion, twenty-one million, twelve thousand, one hundred fifty-three".