121022202021021 has 24 divisors (see below), whose sum is σ = 199795634502464. Its totient is φ = 69151060696320.

The previous prime is 121022202020983. The next prime is 121022202021031. The reversal of 121022202021021 is 120120202220121.

It is a happy number.

121022202021021 is a `hidden beast` number, since 1 + 210 + 2 + 220 + 2 + 0 + 210 + 21 = 666.

It is not a de Polignac number, because 121022202021021 - 2¹⁰ = 121022202019997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121022202020985 and 121022202021003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022202021031) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 61288660 + ... + 63232461.

Almost surely, 2^{121022202021021} is an apocalyptic number.

It is an amenable number.

121022202021021 is a deficient number, since it is larger than the sum of its proper divisors (78773432481443).

121022202021021 is a wasteful number, since it uses less digits than its factorization.

121022202021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124536561 (or 124536558 counting only the distinct ones).

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

Adding to 121022202021021 its reverse (120120202220121), we get a palindrome (241142404241142).

The spelling of 121022202021021 in words is "one hundred twenty-one trillion, twenty-two billion, two hundred two million, twenty-one thousand, twenty-one".