102220521 has 16 divisors (see below), whose sum is σ = 147026880. Its totient is φ = 62798400.

The previous prime is 102220519. The next prime is 102220523. The reversal of 102220521 is 125022201.

It is an interprime number because it is at equal distance from previous prime (102220519) and next prime (102220523).

It is not a de Polignac number, because 102220521 - 2¹ = 102220519 is a prime.

It is a super-2 number, since 2×102220521² = 20898069827022882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102220521.

It is not an unprimeable number, because it can be changed into a prime (102220523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25470 + ... + 29208.

It is an arithmetic number, because the mean of its divisors is an integer number (9189180).

Almost surely, 2^102220521 is an apocalyptic number.

It is an amenable number.

102220521 is a deficient number, since it is larger than the sum of its proper divisors (44806359).

102220521 is a wasteful number, since it uses less digits than its factorization.

102220521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4456.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 102220521 is about 10110.4164602651. The cubic root of 102220521 is about 467.5693450472.

Adding to 102220521 its reverse (125022201), we get a palindrome (227242722).

The spelling of 102220521 in words is "one hundred two million, two hundred twenty thousand, five hundred twenty-one".