21101221210022 has 16 divisors (see below), whose sum is σ = 32750466428544. Its totient is φ = 10186015896000.

The previous prime is 21101221209979. The next prime is 21101221210037. The reversal of 21101221210022 is 22001212210112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404180879 + ... + 404233082.

It is an arithmetic number, because the mean of its divisors is an integer number (2046904151784).

Almost surely, 2^{21101221210022} is an apocalyptic number.

21101221210022 is a deficient number, since it is larger than the sum of its proper divisors (11649245218522).

21101221210022 is a wasteful number, since it uses less digits than its factorization.

21101221210022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808414415.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21101221210022 its reverse (22001212210112), we get a palindrome (43102433420134).

The spelling of 21101221210022 in words is "twenty-one trillion, one hundred one billion, two hundred twenty-one million, two hundred ten thousand, twenty-two".