20021211053 has 2 divisors, whose sum is σ = 20021211054. Its totient is φ = 20021211052.

The previous prime is 20021211017. The next prime is 20021211059. The reversal of 20021211053 is 35011212002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17254661449 + 2766549604 = 131357^2 + 52598^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021211053 - 2²² = 20017016749 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20021211059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010605526 + 10010605527.

It is an arithmetic number, because the mean of its divisors is an integer number (10010605527).

Almost surely, 2^20021211053 is an apocalyptic number.

It is an amenable number.

20021211053 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021211053 is an equidigital number, since it uses as much as digits as its factorization.

20021211053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 20021211053 its reverse (35011212002), we get a palindrome (55032423055).

The spelling of 20021211053 in words is "twenty billion, twenty-one million, two hundred eleven thousand, fifty-three".