121201020220122 has 24 divisors (see below), whose sum is σ = 262609022733876. Its totient is φ = 40399292033856.

The previous prime is 121201020220121. The next prime is 121201020220139. The reversal of 121201020220122 is 221022020102121.

It is a happy number.

121201020220122 is a `hidden beast` number, since 121 + 201 + 0 + 2 + 0 + 220 + 122 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 116525526500601 + 4675493719521 = 10794699^2 + 2162289^2 .

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 = 121201020220095 and 121201020220104.

It is not an unprimeable number, because it can be changed into a prime (121201020220121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86623323 + ... + 88011374.

Almost surely, 2^{121201020220122} is an apocalyptic number.

121201020220122 is an abundant number, since it is smaller than the sum of its proper divisors (141408002513754).

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

121201020220122 is a wasteful number, since it uses less digits than its factorization.

121201020220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174673262 (or 174673259 counting only the distinct ones).

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

Adding to 121201020220122 its reverse (221022020102121), we get a palindrome (342223040322243).

The spelling of 121201020220122 in words is "one hundred twenty-one trillion, two hundred one billion, twenty million, two hundred twenty thousand, one hundred twenty-two".