21111121010222 has 16 divisors (see below), whose sum is σ = 31678057841040. Its totient is φ = 10551768726912.

The previous prime is 21111121010149. The next prime is 21111121010227. The reversal of 21111121010222 is 22201012111112.

It is a self number, because there is not a number n which added to its sum of digits gives 21111121010222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111121010227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152552753 + ... + 152691075.

It is an arithmetic number, because the mean of its divisors is an integer number (1979878615065).

Almost surely, 2^{21111121010222} is an apocalyptic number.

21111121010222 is a deficient number, since it is larger than the sum of its proper divisors (10566936830818).

21111121010222 is a wasteful number, since it uses less digits than its factorization.

21111121010222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165187.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21111121010222 its reverse (22201012111112), we get a palindrome (43312133121334).

The spelling of 21111121010222 in words is "twenty-one trillion, one hundred eleven billion, one hundred twenty-one million, ten thousand, two hundred twenty-two".