20110121001002 has 16 divisors (see below), whose sum is σ = 30901169290824. Its totient is φ = 9809735232000.

The previous prime is 20110121000947. The next prime is 20110121001011. The reversal of 20110121001002 is 20010012101102.

It can be written as a sum of positive squares in 4 ways, for example, as 12560425076761 + 7549695924241 = 3544069^2 + 2747671^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9845252 + ... + 11711072.

Almost surely, 2^{20110121001002} is an apocalyptic number.

20110121001002 is a deficient number, since it is larger than the sum of its proper divisors (10791048289822).

20110121001002 is a wasteful number, since it uses less digits than its factorization.

20110121001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997305.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20110121001002 its reverse (20010012101102), we get a palindrome (40120133102104).

The spelling of 20110121001002 in words is "twenty trillion, one hundred ten billion, one hundred twenty-one million, one thousand, two".