20101212122 has 4 divisors (see below), whose sum is σ = 30151818186. Its totient is φ = 10050606060.

The previous prime is 20101212119. The next prime is 20101212137. The reversal of 20101212122 is 22121210102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17139784561 + 2961427561 = 130919^2 + 54419^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20101212097 and 20101212106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5025303029 + ... + 5025303032.

Almost surely, 2^20101212122 is an apocalyptic number.

20101212122 is a deficient number, since it is larger than the sum of its proper divisors (10050606064).

20101212122 is a wasteful number, since it uses less digits than its factorization.

20101212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10050606063.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20101212122 its reverse (22121210102), we get a palindrome (42222422224).

The spelling of 20101212122 in words is "twenty billion, one hundred one million, two hundred twelve thousand, one hundred twenty-two".