1000021111011 has 48 divisors (see below), whose sum is σ = 1563657338880. Its totient is φ = 612210674880.

The previous prime is 1000021110953. The next prime is 1000021111013. The reversal of 1000021111011 is 1101111200001.

It is not a de Polignac number, because 1000021111011 - 2¹³ = 1000021102819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1000021110984 and 1000021111002.

It is not an unprimeable number, because it can be changed into a prime (1000021111013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28812510 + ... + 28847196.

It is an arithmetic number, because the mean of its divisors is an integer number (32576194560).

Almost surely, 2^{1000021111011} is an apocalyptic number.

1000021111011 is a deficient number, since it is larger than the sum of its proper divisors (563636227869).

1000021111011 is a wasteful number, since it uses less digits than its factorization.

1000021111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35976 (or 35973 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 1000021111011 its reverse (1101111200001), we get a palindrome (2101132311012).

The spelling of 1000021111011 in words is "one trillion, twenty-one million, one hundred eleven thousand, eleven".