1002120011 has 4 divisors (see below), whose sum is σ = 1003132224. Its totient is φ = 1001107800.

The previous prime is 1002119999. The next prime is 1002120019. The reversal of 1002120011 is 1100212001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1002120011 - 2¹⁰ = 1002118987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002120019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504620 + ... + 506601.

It is an arithmetic number, because the mean of its divisors is an integer number (250783056).

Almost surely, 2^1002120011 is an apocalyptic number.

1002120011 is a deficient number, since it is larger than the sum of its proper divisors (1012213).

1002120011 is an equidigital number, since it uses as much as digits as its factorization.

1002120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012212.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1002120011 is about 31656.2791717536. The cubic root of 1002120011 is about 1000.7061715377.

Adding to 1002120011 its reverse (1100212001), we get a palindrome (2102332012).

The spelling of 1002120011 in words is "one billion, two million, one hundred twenty thousand, eleven".