20101221122 has 4 divisors (see below), whose sum is σ = 30151831686. Its totient is φ = 10050610560.

The previous prime is 20101221083. The next prime is 20101221143. The reversal of 20101221122 is 22112210102.

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., 16241208481 + 3860012641 = 127441^2 + 62129^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20101221097 and 20101221106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5025305279 + ... + 5025305282.

Almost surely, 2^20101221122 is an apocalyptic number.

20101221122 is a deficient number, since it is larger than the sum of its proper divisors (10050610564).

20101221122 is a wasteful number, since it uses less digits than its factorization.

20101221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10050610563.

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

Adding to 20101221122 its reverse (22112210102), we get a palindrome (42213431224).

The spelling of 20101221122 in words is "twenty billion, one hundred one million, two hundred twenty-one thousand, one hundred twenty-two".