21121201221122 has 32 divisors (see below), whose sum is σ = 31885460006400. Its totient is φ = 10492964080128.

The previous prime is 21121201221091. The next prime is 21121201221137. The reversal of 21121201221122 is 22112210212112.

It is a super-2 number, since 2×21121201221122² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121201221094 and 21121201221103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420104978 + ... + 420155250.

It is an arithmetic number, because the mean of its divisors is an integer number (996420625200).

Almost surely, 2^{21121201221122} is an apocalyptic number.

21121201221122 is a deficient number, since it is larger than the sum of its proper divisors (10764258785278).

21121201221122 is a wasteful number, since it uses less digits than its factorization.

21121201221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52730.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21121201221122 its reverse (22112210212112), we get a palindrome (43233411433234).

The spelling of 21121201221122 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred one million, two hundred twenty-one thousand, one hundred twenty-two".