1000020120111 has 12 divisors (see below), whose sum is σ = 1507276703088. Its totient is φ = 637693989504.

The previous prime is 1000020120097. The next prime is 1000020120131. The reversal of 1000020120111 is 1110210200001.

It is a happy number.

1000020120111 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1000020120111 - 2⁵ = 1000020120079 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 = 1000020120093 and 1000020120102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000020120131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2415507330 + ... + 2415507743.

It is an arithmetic number, because the mean of its divisors is an integer number (125606391924).

Almost surely, 2^{1000020120111} is an apocalyptic number.

1000020120111 is a deficient number, since it is larger than the sum of its proper divisors (507256582977).

1000020120111 is a wasteful number, since it uses less digits than its factorization.

1000020120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4831015102 (or 4831015099 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1000020120111 its reverse (1110210200001), we get a palindrome (2110230320112).

The spelling of 1000020120111 in words is "one trillion, twenty million, one hundred twenty thousand, one hundred eleven".