21212202201110 has 32 divisors (see below), whose sum is σ = 38204574177600. Its totient is φ = 8479857576960.

The previous prime is 21212202201107. The next prime is 21212202201131. The reversal of 21212202201110 is 1110220221212.

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, 151739726 + ... + 151879454.

It is an arithmetic number, because the mean of its divisors is an integer number (1193892943050).

Almost surely, 2^{21212202201110} is an apocalyptic number.

21212202201110 is a deficient number, since it is larger than the sum of its proper divisors (16992371976490).

21212202201110 is a wasteful number, since it uses less digits than its factorization.

21212202201110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148616.

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

Adding to 21212202201110 its reverse (1110220221212), we get a palindrome (22322422422322).

The spelling of 21212202201110 in words is "twenty-one trillion, two hundred twelve billion, two hundred two million, two hundred one thousand, one hundred ten".