121021110121002 has 192 divisors, whose sum is σ = 303836511613824. Its totient is φ = 31852561305600.

The previous prime is 121021110120983. The next prime is 121021110121061. The reversal of 121021110121002 is 200121011120121.

It is a happy number.

It is a super-2 number, since 2×121021110121002² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7265472258 + ... + 7265488914.

It is an arithmetic number, because the mean of its divisors is an integer number (1582481831322).

Almost surely, 2^{121021110121002} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121021110121002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151918255806912).

121021110121002 is an abundant number, since it is smaller than the sum of its proper divisors (182815401492822).

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

121021110121002 is a wasteful number, since it uses less digits than its factorization.

121021110121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20453 (or 20446 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121021110121002 its reverse (200121011120121), we get a palindrome (321142121241123).

The spelling of 121021110121002 in words is "one hundred twenty-one trillion, twenty-one billion, one hundred ten million, one hundred twenty-one thousand, two".