11212020201999 has 32 divisors (see below), whose sum is σ = 16164389536000. Its totient is φ = 6888645679104.

The previous prime is 11212020201973. The next prime is 11212020202013. The reversal of 11212020201999 is 99910202021211.

It is a happy number.

It is not a de Polignac number, because 11212020201999 - 2⁷ = 11212020201871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212020201959) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11267712 + ... + 12222330.

It is an arithmetic number, because the mean of its divisors is an integer number (505137173000).

Almost surely, 2^{11212020201999} is an apocalyptic number.

11212020201999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11212020201999 is a deficient number, since it is larger than the sum of its proper divisors (4952369334001).

11212020201999 is a wasteful number, since it uses less digits than its factorization.

11212020201999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960247.

The product of its (nonzero) digits is 11664, while the sum is 39.

The spelling of 11212020201999 in words is "eleven trillion, two hundred twelve billion, twenty million, two hundred one thousand, nine hundred ninety-nine".