102620121 has 32 divisors (see below), whose sum is σ = 147840000. Its totient is φ = 63125568.

The previous prime is 102620107. The next prime is 102620123. The reversal of 102620121 is 121026201.

It is not a de Polignac number, because 102620121 - 2¹¹ = 102618073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102620121.

It is not an unprimeable number, because it can be changed into a prime (102620123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 515580 + ... + 515778.

It is an arithmetic number, because the mean of its divisors is an integer number (4620000).

Almost surely, 2^102620121 is an apocalyptic number.

It is an amenable number.

102620121 is a deficient number, since it is larger than the sum of its proper divisors (45219879).

102620121 is a wasteful number, since it uses less digits than its factorization.

102620121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 102620121 is about 10130.1589819706. The cubic root of 102620121 is about 468.1778261696.

Adding to 102620121 its reverse (121026201), we get a palindrome (223646322).

The spelling of 102620121 in words is "one hundred two million, six hundred twenty thousand, one hundred twenty-one".