1020020100111 has 12 divisors (see below), whose sum is σ = 1507626608488. Its totient is φ = 664199134704.

The previous prime is 1020020100109. The next prime is 1020020100131. The reversal of 1020020100111 is 1110010200201.

It is a happy number.

It is not a de Polignac number, because 1020020100111 - 2¹ = 1020020100109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020020100093 and 1020020100102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020020100131) 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, 1317855040 + ... + 1317855813.

Almost surely, 2^{1020020100111} is an apocalyptic number.

1020020100111 is a deficient number, since it is larger than the sum of its proper divisors (487606508377).

1020020100111 is a wasteful number, since it uses less digits than its factorization.

1020020100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635710902 (or 2635710899 counting only the distinct ones).

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

Adding to 1020020100111 its reverse (1110010200201), we get a palindrome (2130030300312).

The spelling of 1020020100111 in words is "one trillion, twenty billion, twenty million, one hundred thousand, one hundred eleven".