121002102 has 48 divisors (see below), whose sum is σ = 283308480. Its totient is φ = 37103616.

The previous prime is 121002061. The next prime is 121002109. The reversal of 121002102 is 201200121.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85174 + ... + 86582.

It is an arithmetic number, because the mean of its divisors is an integer number (5902260).

Almost surely, 2^121002102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121002102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141654240).

121002102 is an abundant number, since it is smaller than the sum of its proper divisors (162306378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121002102 is a wasteful number, since it uses less digits than its factorization.

121002102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797 (or 1794 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 121002102 is about 11000.0955450396. The cubic root of 121002102 is about 494.6116084063.

Adding to 121002102 its reverse (201200121), we get a palindrome (322202223).

It can be divided in two parts, 121002 and 102, that added together give a square (121104 = 348²).

The spelling of 121002102 in words is "one hundred twenty-one million, two thousand, one hundred two".