21102110001222 has 16 divisors (see below), whose sum is σ = 42577708676400. Its totient is φ = 6971788554752.

The previous prime is 21102110001197. The next prime is 21102110001239. The reversal of 21102110001222 is 22210001120112.

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, 15562027347 + ... + 15562028702.

It is an arithmetic number, because the mean of its divisors is an integer number (2661106792275).

Almost surely, 2^{21102110001222} is an apocalyptic number.

21102110001222 is an abundant number, since it is smaller than the sum of its proper divisors (21475598675178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21102110001222 is a wasteful number, since it uses less digits than its factorization.

21102110001222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31124056167.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21102110001222 its reverse (22210001120112), we get a palindrome (43312111121334).

The spelling of 21102110001222 in words is "twenty-one trillion, one hundred two billion, one hundred ten million, one thousand, two hundred twenty-two".