102211021 has 8 divisors (see below), whose sum is σ = 118062144. Its totient is φ = 87453120.

The previous prime is 102211003. The next prime is 102211033. The reversal of 102211021 is 120112201.

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 102211021 - 2⁵ = 102210989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102210989 and 102211007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102211121) 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, 273105 + ... + 273478.

It is an arithmetic number, because the mean of its divisors is an integer number (14757768).

Almost surely, 2^102211021 is an apocalyptic number.

102211021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102211021 is a deficient number, since it is larger than the sum of its proper divisors (15851123).

102211021 is a wasteful number, since it uses less digits than its factorization.

102211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546611.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 102211021 is about 10109.9466368522. The cubic root of 102211021 is about 467.5548598722.

Adding to 102211021 its reverse (120112201), we get a palindrome (222323222).

The spelling of 102211021 in words is "one hundred two million, two hundred eleven thousand, twenty-one".