20001121220104 has 32 divisors (see below), whose sum is σ = 38796177571200. Its totient is φ = 9655489856320.

The previous prime is 20001121220099. The next prime is 20001121220123. The reversal of 20001121220104 is 40102212110002.

It is a super-2 number, since 2×20001121220104² (a number of 27 digits) contains 22 as substring.

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, 9256539 + ... + 11210965.

It is an arithmetic number, because the mean of its divisors is an integer number (1212380549100).

Almost surely, 2^{20001121220104} is an apocalyptic number.

It is an amenable number.

20001121220104 is a deficient number, since it is larger than the sum of its proper divisors (18795056351096).

20001121220104 is a wasteful number, since it uses less digits than its factorization.

20001121220104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998573 (or 1998569 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20001121220104 its reverse (40102212110002), we get a palindrome (60103333330106).

The spelling of 20001121220104 in words is "twenty trillion, one billion, one hundred twenty-one million, two hundred twenty thousand, one hundred four".