20101222121012 has 48 divisors (see below), whose sum is σ = 36608236422912. Its totient is φ = 9649889182080.

The previous prime is 20101222120997. The next prime is 20101222121047. The reversal of 20101222121012 is 21012122210102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16155893 + ... + 17355555.

It is an arithmetic number, because the mean of its divisors is an integer number (762671592144).

Almost surely, 2^{20101222121012} is an apocalyptic number.

It is an amenable number.

20101222121012 is a deficient number, since it is larger than the sum of its proper divisors (16507014301900).

20101222121012 is a wasteful number, since it uses less digits than its factorization.

20101222121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201368 (or 1201366 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20101222121012 its reverse (21012122210102), we get a palindrome (41113344331114).

The spelling of 20101222121012 in words is "twenty trillion, one hundred one billion, two hundred twenty-two million, one hundred twenty-one thousand, twelve".