20100122012 has 6 divisors (see below), whose sum is σ = 35175213528. Its totient is φ = 10050061004.

The previous prime is 20100121997. The next prime is 20100122051. The reversal of 20100122012 is 21022100102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20100121984 and 20100122002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2512515248 + ... + 2512515255.

It is an arithmetic number, because the mean of its divisors is an integer number (5862535588).

Almost surely, 2^20100122012 is an apocalyptic number.

It is an amenable number.

20100122012 is a deficient number, since it is larger than the sum of its proper divisors (15075091516).

20100122012 is a wasteful number, since it uses less digits than its factorization.

20100122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5025030507 (or 5025030505 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20100122012 its reverse (21022100102), we get a palindrome (41122222114).

The spelling of 20100122012 in words is "twenty billion, one hundred million, one hundred twenty-two thousand, twelve".