20002121112222 has 24 divisors (see below), whose sum is σ = 43339831835976. Its totient is φ = 6667080971856.

The previous prime is 20002121112173. The next prime is 20002121112343. The reversal of 20002121112222 is 22221112120002.

It is a happy number.

20002121112222 is a `hidden beast` number, since 200 + 0 + 21 + 211 + 12 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20002121112195 and 20002121112204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23972793 + ... + 24793124.

It is an arithmetic number, because the mean of its divisors is an integer number (1805826326499).

Almost surely, 2^{20002121112222} is an apocalyptic number.

20002121112222 is an abundant number, since it is smaller than the sum of its proper divisors (23337710723754).

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

20002121112222 is a wasteful number, since it uses less digits than its factorization.

20002121112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48788712 (or 48788709 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20002121112222 its reverse (22221112120002), we get a palindrome (42223233232224).

The spelling of 20002121112222 in words is "twenty trillion, two billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twenty-two".