1001121011 has 8 divisors (see below), whose sum is σ = 1092808704. Its totient is φ = 909546120.

The previous prime is 1001120999. The next prime is 1001121031. The reversal of 1001121011 is 1101211001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001121011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1001121011.

It is not an unprimeable number, because it can be changed into a prime (1001121031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9071 + ... + 45656.

It is an arithmetic number, because the mean of its divisors is an integer number (136601088).

Almost surely, 2^1001121011 is an apocalyptic number.

1001121011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1001121011 is a deficient number, since it is larger than the sum of its proper divisors (91687693).

1001121011 is a wasteful number, since it uses less digits than its factorization.

1001121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56401.

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 1001121011 is about 31640.4963772694. The cubic root of 1001121011 is about 1000.3735307907.

Adding to 1001121011 its reverse (1101211001), we get a palindrome (2102332012).

The spelling of 1001121011 in words is "one billion, one million, one hundred twenty-one thousand, eleven".