102012021111 has 128 divisors (see below), whose sum is σ = 185187244032. Its totient is φ = 48234240000.

The previous prime is 102012021103. The next prime is 102012021121. The reversal of 102012021111 is 111120210201.

It is not a de Polignac number, because 102012021111 - 2³ = 102012021103 is a prime.

It is a super-2 number, since 2×102012021111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012021121) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 96146521 + ... + 96147581.

It is an arithmetic number, because the mean of its divisors is an integer number (1446775344).

Almost surely, 2^102012021111 is an apocalyptic number.

102012021111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

102012021111 is a deficient number, since it is larger than the sum of its proper divisors (83175222921).

102012021111 is a wasteful number, since it uses less digits than its factorization.

102012021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 102012021111 its reverse (111120210201), we get a palindrome (213132231312).

The spelling of 102012021111 in words is "one hundred two billion, twelve million, twenty-one thousand, one hundred eleven".