20021112201953 has 2 divisors, whose sum is σ = 20021112201954. Its totient is φ = 20021112201952.

The previous prime is 20021112201907. The next prime is 20021112202033. The reversal of 20021112201953 is 35910221112002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16556663344144 + 3464448857809 = 4068988^2 + 1861303^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021112201953 - 2¹² = 20021112197857 is a prime.

It is not a weakly prime, because it can be changed into another prime (20021112221953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010556100976 + 10010556100977.

It is an arithmetic number, because the mean of its divisors is an integer number (10010556100977).

Almost surely, 2^{20021112201953} is an apocalyptic number.

It is an amenable number.

20021112201953 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021112201953 is an equidigital number, since it uses as much as digits as its factorization.

20021112201953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

Adding to 20021112201953 its reverse (35910221112002), we get a palindrome (55931333313955).

The spelling of 20021112201953 in words is "twenty trillion, twenty-one billion, one hundred twelve million, two hundred one thousand, nine hundred fifty-three".