1020020211999 has 12 divisors (see below), whose sum is σ = 1473552666976. Its totient is φ = 679925718432.

The previous prime is 1020020211961. The next prime is 1020020212009. The reversal of 1020020211999 is 9991120200201.

It is not a de Polignac number, because 1020020211999 - 2¹¹ = 1020020209951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020020215999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7239367 + ... + 7378920.

Almost surely, 2^{1020020211999} is an apocalyptic number.

1020020211999 is a deficient number, since it is larger than the sum of its proper divisors (453532454977).

1020020211999 is a wasteful number, since it uses less digits than its factorization.

1020020211999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14626046 (or 14626043 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 1020020211999 in words is "one trillion, twenty billion, twenty million, two hundred eleven thousand, nine hundred ninety-nine".