20021211209983 has 2 divisors, whose sum is σ = 20021211209984. Its totient is φ = 20021211209982.

The previous prime is 20021211209927. The next prime is 20021211210031. The reversal of 20021211209983 is 38990211212002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20021211209983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20021211909983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010605604991 + 10010605604992.

It is an arithmetic number, because the mean of its divisors is an integer number (10010605604992).

Almost surely, 2^{20021211209983} is an apocalyptic number.

20021211209983 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021211209983 is an equidigital number, since it uses as much as digits as its factorization.

20021211209983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 40.

The spelling of 20021211209983 in words is "twenty trillion, twenty-one billion, two hundred eleven million, two hundred nine thousand, nine hundred eighty-three".