21220021012022 has 64 divisors (see below), whose sum is σ = 37419670517760. Its totient is φ = 8834459861376.

The previous prime is 21220021012019. The next prime is 21220021012033. The reversal of 21220021012022 is 22021012002212.

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 31 ways as a sum of consecutive naturals, for example, 1733797379 + ... + 1733809617.

It is an arithmetic number, because the mean of its divisors is an integer number (584682351840).

Almost surely, 2^{21220021012022} is an apocalyptic number.

21220021012022 is a deficient number, since it is larger than the sum of its proper divisors (16199649505738).

21220021012022 is a wasteful number, since it uses less digits than its factorization.

21220021012022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17325.

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

Adding to 21220021012022 its reverse (22021012002212), we get a palindrome (43241033014234).

The spelling of 21220021012022 in words is "twenty-one trillion, two hundred twenty billion, twenty-one million, twelve thousand, twenty-two".