20100021121112 has 8 divisors (see below), whose sum is σ = 37687539602100. Its totient is φ = 10050010560552.

The previous prime is 20100021121099. The next prime is 20100021121121. The reversal of 20100021121112 is 21112112000102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1256251320062 + ... + 1256251320077.

Almost surely, 2^{20100021121112} is an apocalyptic number.

It is an amenable number.

20100021121112 is a deficient number, since it is larger than the sum of its proper divisors (17587518480988).

20100021121112 is a wasteful number, since it uses less digits than its factorization.

20100021121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2512502640145 (or 2512502640141 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20100021121112 its reverse (21112112000102), we get a palindrome (41212133121214).

The spelling of 20100021121112 in words is "twenty trillion, one hundred billion, twenty-one million, one hundred twenty-one thousand, one hundred twelve".