121021210002 has 128 divisors (see below), whose sum is σ = 322683844608. Its totient is φ = 29291904000.

The previous prime is 121021209943. The next prime is 121021210073. The reversal of 121021210002 is 200012120121.

It is a super-4 number, since 4×121021210002⁴ (a number of 45 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 121021210002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 716973 + ... + 869535.

It is an arithmetic number, because the mean of its divisors is an integer number (2520967536).

Almost surely, 2^121021210002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121021210002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161341922304).

121021210002 is an abundant number, since it is smaller than the sum of its proper divisors (201662634606).

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

121021210002 is a wasteful number, since it uses less digits than its factorization.

121021210002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152704.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121021210002 its reverse (200012120121), we get a palindrome (321033330123).

It can be divided in two parts, 1210 and 21210002, that added together give a palindrome (21211212).

The spelling of 121021210002 in words is "one hundred twenty-one billion, twenty-one million, two hundred ten thousand, two".