221120122002021 has 32 divisors (see below), whose sum is σ = 358051776935040. Its totient is φ = 133754973955200.

The previous prime is 221120122001971. The next prime is 221120122002049. The reversal of 221120122002021 is 120200221021122.

It is a happy number.

221120122002021 is a `hidden beast` number, since 221 + 1 + 20 + 1 + 220 + 0 + 202 + 1 = 666.

It is not a de Polignac number, because 221120122002021 - 2⁶ = 221120122001957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221120122001985 and 221120122002003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221120122004021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 714348330 + ... + 714657803.

It is an arithmetic number, because the mean of its divisors is an integer number (11189118029220).

Almost surely, 2^{221120122002021} is an apocalyptic number.

It is an amenable number.

221120122002021 is a deficient number, since it is larger than the sum of its proper divisors (136931654933019).

221120122002021 is a wasteful number, since it uses less digits than its factorization.

221120122002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429006674 (or 1429006668 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221120122002021 its reverse (120200221021122), we get a palindrome (341320343023143).

The spelling of 221120122002021 in words is "two hundred twenty-one trillion, one hundred twenty billion, one hundred twenty-two million, two thousand, twenty-one".