2111111021000 has 32 divisors (see below), whose sum is σ = 4939999791480. Its totient is φ = 844444408000.

The previous prime is 2111111020969. The next prime is 2111111021009. The reversal of 2111111021000 is 1201111112.

It can be written as a sum of positive squares in 4 ways, for example, as 944507972164 + 1166603048836 = 971858^2 + 1080094^2 .

It is a super-3 number, since 3×2111111021000³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2111111021009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1055554511 + ... + 1055556510.

Almost surely, 2^{2111111021000} is an apocalyptic number.

2111111021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111111021000 is an abundant number, since it is smaller than the sum of its proper divisors (2828888770480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2111111021000 is a wasteful number, since it uses less digits than its factorization.

2111111021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111111042 (or 2111111028 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 2111111021000 its reverse (1201111112), we get a palindrome (2112312132112).

The spelling of 2111111021000 in words is "two trillion, one hundred eleven billion, one hundred eleven million, twenty-one thousand".