121122221022 has 96 divisors (see below), whose sum is σ = 312518344320. Its totient is φ = 34771900320.

The previous prime is 121122220963. The next prime is 121122221063. The reversal of 121122221022 is 220122221121.

It is a happy number.

121122221022 is a `hidden beast` number, since 1 + 211 + 222 + 210 + 22 = 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 = 121122220986 and 121122221004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 494653 + ... + 697800.

It is an arithmetic number, because the mean of its divisors is an integer number (3255399420).

Almost surely, 2^121122221022 is an apocalyptic number.

121122221022 is an abundant number, since it is smaller than the sum of its proper divisors (191396123298).

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

121122221022 is a wasteful number, since it uses less digits than its factorization.

121122221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192500 (or 1192488 counting only the distinct ones).

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

Adding to 121122221022 its reverse (220122221121), we get a palindrome (341244442143).

Subtracting 121122221022 from its reverse (220122221121), we obtain a palindrome (99000000099).

The spelling of 121122221022 in words is "one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty-two".