1002020121011 has 16 divisors (see below), whose sum is σ = 1242127891200. Its totient is φ = 787103470368.

The previous prime is 1002020120999. The next prime is 1002020121019. The reversal of 1002020121011 is 1101210202001.

It is a cyclic number.

It is not a de Polignac number, because 1002020121011 - 2⁶ = 1002020120947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002020120983 and 1002020121001.

It is not an unprimeable number, because it can be changed into a prime (1002020121019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39596021 + ... + 39621318.

It is an arithmetic number, because the mean of its divisors is an integer number (77632993200).

Almost surely, 2^{1002020121011} is an apocalyptic number.

1002020121011 is a deficient number, since it is larger than the sum of its proper divisors (240107770189).

1002020121011 is a wasteful number, since it uses less digits than its factorization.

1002020121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79217498.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1002020121011 its reverse (1101210202001), we get a palindrome (2103230323012).

The spelling of 1002020121011 in words is "one trillion, two billion, twenty million, one hundred twenty-one thousand, eleven".