21120022120022 has 32 divisors (see below), whose sum is σ = 36907921465344. Its totient is φ = 8877230661600.

The previous prime is 21120022120003. The next prime is 21120022120051. The reversal of 21120022120022 is 22002122002112.

It is a happy number.

It is a congruent number.

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, 55431893 + ... + 55811600.

It is an arithmetic number, because the mean of its divisors is an integer number (1153372545792).

Almost surely, 2^{21120022120022} is an apocalyptic number.

21120022120022 is a deficient number, since it is larger than the sum of its proper divisors (15787899345322).

21120022120022 is a wasteful number, since it uses less digits than its factorization.

21120022120022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111243764.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21120022120022 its reverse (22002122002112), we get a palindrome (43122144122134).

The spelling of 21120022120022 in words is "twenty-one trillion, one hundred twenty billion, twenty-two million, one hundred twenty thousand, twenty-two".