121021020222210 has 40 divisors (see below), whose sum is σ = 325412076599676. Its totient is φ = 32272272059040.

The previous prime is 121021020222203. The next prime is 121021020222227. The reversal of 121021020222210 is 12222020120121.

It is a happy number.

121021020222210 is a `hidden beast` number, since 1 + 2 + 1 + 0 + 210 + 20 + 222 + 210 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 114698123897841 + 6322896324369 = 10709721^2 + 2514537^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 74704332661 + ... + 74704334280.

Almost surely, 2^{121021020222210} is an apocalyptic number.

121021020222210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121021020222210 is an abundant number, since it is smaller than the sum of its proper divisors (204391056377466).

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

121021020222210 is a wasteful number, since it uses less digits than its factorization.

121021020222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149408666960 (or 149408666951 counting only the distinct ones).

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

Adding to 121021020222210 its reverse (12222020120121), we get a palindrome (133243040342331).

The spelling of 121021020222210 in words is "one hundred twenty-one trillion, twenty-one billion, twenty million, two hundred twenty-two thousand, two hundred ten".