121021110222222 has 64 divisors (see below), whose sum is σ = 285554626560000. Its totient is φ = 33460683452640.

The previous prime is 121021110222209. The next prime is 121021110222227. The reversal of 121021110222222 is 222222011120121.

121021110222222 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×121021110222222² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021110222227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30000679 + ... + 33794717.

It is an arithmetic number, because the mean of its divisors is an integer number (4461791040000).

Almost surely, 2^{121021110222222} is an apocalyptic number.

121021110222222 is an abundant number, since it is smaller than the sum of its proper divisors (164533516337778).

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

121021110222222 is a wasteful number, since it uses less digits than its factorization.

121021110222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3818581.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121021110222222 its reverse (222222011120121), we get a palindrome (343243121342343).

The spelling of 121021110222222 in words is "one hundred twenty-one trillion, twenty-one billion, one hundred ten million, two hundred twenty-two thousand, two hundred twenty-two".