20121111100022 has 4 divisors (see below), whose sum is σ = 30181666650036. Its totient is φ = 10060555550010.

The previous prime is 20121111100021. The next prime is 20121111100061. The reversal of 20121111100022 is 22000111112102.

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

It is a super-2 number, since 2×20121111100022² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121111100021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5030277775004 + ... + 5030277775007.

It is an arithmetic number, because the mean of its divisors is an integer number (7545416662509).

Almost surely, 2^{20121111100022} is an apocalyptic number.

20121111100022 is a deficient number, since it is larger than the sum of its proper divisors (10060555550014).

20121111100022 is a wasteful number, since it uses less digits than its factorization.

20121111100022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10060555550013.

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

Adding to 20121111100022 its reverse (22000111112102), we get a palindrome (42121222212124).

The spelling of 20121111100022 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, one hundred thousand, twenty-two".