102221131 has 4 divisors (see below), whose sum is σ = 106665552. Its totient is φ = 97776712.

The previous prime is 102221129. The next prime is 102221137. The reversal of 102221131 is 131122201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131122201 = 7 ⋅18731743.

It is a cyclic number.

It is not a de Polignac number, because 102221131 - 2¹ = 102221129 is a prime.

It is a super-2 number, since 2×102221131² = 20898319245838322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102221137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2222176 + ... + 2222221.

It is an arithmetic number, because the mean of its divisors is an integer number (26666388).

Almost surely, 2^102221131 is an apocalyptic number.

102221131 is a deficient number, since it is larger than the sum of its proper divisors (4444421).

102221131 is an equidigital number, since it uses as much as digits as its factorization.

102221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4444420.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 102221131 is about 10110.4466271278. The cubic root of 102221131 is about 467.5702751172.

Adding to 102221131 its reverse (131122201), we get a palindrome (233343332).

The spelling of 102221131 in words is "one hundred two million, two hundred twenty-one thousand, one hundred thirty-one".