102020111 has 8 divisors (see below), whose sum is σ = 112718304. Its totient is φ = 91843840.

The previous prime is 102020099. The next prime is 102020119. The reversal of 102020111 is 111020201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102020111 - 2¹⁰ = 102019087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130070 + ... + 130851.

It is an arithmetic number, because the mean of its divisors is an integer number (14089788).

Almost surely, 2^102020111 is an apocalyptic number.

102020111 is a deficient number, since it is larger than the sum of its proper divisors (10698193).

102020111 is a wasteful number, since it uses less digits than its factorization.

102020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260961.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 102020111 is about 10100.5005321519. The cubic root of 102020111 is about 467.2635784003.

Adding to 102020111 its reverse (111020201), we get a palindrome (213040312).

It can be divided in two parts, 1020201 and 11, that multiplied together give a palindrome (11222211).

The spelling of 102020111 in words is "one hundred two million, twenty thousand, one hundred eleven".