20110121002 has 16 divisors (see below), whose sum is σ = 30355853472. Its totient is φ = 9991566000.

The previous prime is 20110120993. The next prime is 20110121023. The reversal of 20110121002 is 20012101102.

It is a self number, because there is not a number n which added to its sum of digits gives 20110121002.

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, 672877 + ... + 702127.

It is an arithmetic number, because the mean of its divisors is an integer number (1897240842).

Almost surely, 2^20110121002 is an apocalyptic number.

20110121002 is a deficient number, since it is larger than the sum of its proper divisors (10245732470).

20110121002 is a wasteful number, since it uses less digits than its factorization.

20110121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31413.

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

Adding to 20110121002 its reverse (20012101102), we get a palindrome (40122222104).

The spelling of 20110121002 in words is "twenty billion, one hundred ten million, one hundred twenty-one thousand, two".