102121305425 has 36 divisors (see below), whose sum is σ = 131270221680. Its totient is φ = 78806159040.

The previous prime is 102121305389. The next prime is 102121305439. The reversal of 102121305425 is 524503121201.

It is not a de Polignac number, because 102121305425 - 2¹² = 102121301329 is a prime.

It is a super-2 number, since 2×102121305425² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102121305394 and 102121305403.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 36224666 + ... + 36227484.

Almost surely, 2^102121305425 is an apocalyptic number.

It is an amenable number.

102121305425 is a deficient number, since it is larger than the sum of its proper divisors (29148916255).

102121305425 is a wasteful number, since it uses less digits than its factorization.

102121305425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4610 (or 4576 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 102121305425 its reverse (524503121201), we get a palindrome (626624426626).

The spelling of 102121305425 in words is "one hundred two billion, one hundred twenty-one million, three hundred five thousand, four hundred twenty-five".