20121111221002 has 48 divisors (see below), whose sum is σ = 34979320233792. Its totient is φ = 8607187975680.

The previous prime is 20121111220817. The next prime is 20121111221009. The reversal of 20121111221002 is 20012211112102.

It is not an unprimeable number, because it can be changed into a prime (20121111221009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73571803 + ... + 73844785.

It is an arithmetic number, because the mean of its divisors is an integer number (728735838204).

Almost surely, 2^{20121111221002} is an apocalyptic number.

20121111221002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20121111221002 is a deficient number, since it is larger than the sum of its proper divisors (14858209012790).

20121111221002 is a wasteful number, since it uses less digits than its factorization.

20121111221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284623 (or 284606 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20121111221002 its reverse (20012211112102), we get a palindrome (40133322333104).

The spelling of 20121111221002 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, two hundred twenty-one thousand, two".