1002020122111 has 4 divisors (see below), whose sum is σ = 1002057879592. Its totient is φ = 1001982364632.

The previous prime is 1002020122069. The next prime is 1002020122121. The reversal of 1002020122111 is 1112210202001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002020122111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002020122091 and 1002020122100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002020122121) 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, 18838905 + ... + 18892018.

It is an arithmetic number, because the mean of its divisors is an integer number (250514469898).

Almost surely, 2^{1002020122111} is an apocalyptic number.

1002020122111 is a deficient number, since it is larger than the sum of its proper divisors (37757481).

1002020122111 is an equidigital number, since it uses as much as digits as its factorization.

1002020122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37757480.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1002020122111 its reverse (1112210202001), we get a palindrome (2114230324112).

The spelling of 1002020122111 in words is "one trillion, two billion, twenty million, one hundred twenty-two thousand, one hundred eleven".