121220111022222 has 48 divisors (see below), whose sum is σ = 248214256633728. Its totient is φ = 39466254396240.

The previous prime is 121220111022211. The next prime is 121220111022223. The reversal of 121220111022222 is 222220111022121.

It is a super-2 number, since 2×121220111022222² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220111022223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1055103993 + ... + 1055218875.

It is an arithmetic number, because the mean of its divisors is an integer number (5171130346536).

Almost surely, 2^{121220111022222} is an apocalyptic number.

121220111022222 is an abundant number, since it is smaller than the sum of its proper divisors (126994145611506).

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

121220111022222 is a wasteful number, since it uses less digits than its factorization.

121220111022222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210085 (or 210042 counting only the distinct ones).

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

Adding to 121220111022222 its reverse (222220111022121), we get a palindrome (343440222044343).

The spelling of 121220111022222 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, twenty-two thousand, two hundred twenty-two".