102121102 has 4 divisors (see below), whose sum is σ = 153181656. Its totient is φ = 51060550.

The previous prime is 102121069. The next prime is 102121109. The reversal of 102121102 is 201121201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 201121201 = 83 ⋅2423147.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25530274 + ... + 25530277.

It is an arithmetic number, because the mean of its divisors is an integer number (38295414).

Almost surely, 2^102121102 is an apocalyptic number.

102121102 is a deficient number, since it is larger than the sum of its proper divisors (51060554).

102121102 is an equidigital number, since it uses as much as digits as its factorization.

102121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51060553.

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

The square root of 102121102 is about 10105.4986022462. The cubic root of 102121102 is about 467.4177109303.

Adding to 102121102 its reverse (201121201), we get a palindrome (303242303).

Subtracting 102121102 from its reverse (201121201), we obtain a palindrome (99000099).

The spelling of 102121102 in words is "one hundred two million, one hundred twenty-one thousand, one hundred two".