21121110202122 has 48 divisors (see below), whose sum is σ = 53036510147712. Its totient is φ = 5949608505120.

The previous prime is 21121110202067. The next prime is 21121110202139. The reversal of 21121110202122 is 22120201112112.

21121110202122 is a `hidden beast` number, since 211 + 21 + 110 + 202 + 122 = 666.

It is a super-2 number, since 2×21121110202122² (a number of 27 digits) contains 22 as substring.

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 = 21121110202095 and 21121110202104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1180468933 + ... + 1180486824.

It is an arithmetic number, because the mean of its divisors is an integer number (1104927294744).

Almost surely, 2^{21121110202122} is an apocalyptic number.

21121110202122 is an abundant number, since it is smaller than the sum of its proper divisors (31915399945590).

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

21121110202122 is a wasteful number, since it uses less digits than its factorization.

21121110202122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360955843 (or 2360955840 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21121110202122 its reverse (22120201112112), we get a palindrome (43241311314234).

The spelling of 21121110202122 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred ten million, two hundred two thousand, one hundred twenty-two".