121012221210021 has 24 divisors (see below), whose sum is σ = 175359222043200. Its totient is φ = 80414607897600.

The previous prime is 121012221210019. The next prime is 121012221210053. The reversal of 121012221210021 is 120012122210121.

121012221210021 is a `hidden beast` number, since 1 + 210 + 1 + 2 + 221 + 210 + 0 + 21 = 666.

It is not a de Polignac number, because 121012221210021 - 2¹ = 121012221210019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121012221209976 and 121012221210003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012221210011) 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, 444482266 + ... + 444754436.

It is an arithmetic number, because the mean of its divisors is an integer number (7306634251800).

Almost surely, 2^{121012221210021} is an apocalyptic number.

It is an amenable number.

121012221210021 is a deficient number, since it is larger than the sum of its proper divisors (54347000833179).

121012221210021 is a wasteful number, since it uses less digits than its factorization.

121012221210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431337 (or 431334 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121012221210021 its reverse (120012122210121), we get a palindrome (241024343420142).

The spelling of 121012221210021 in words is "one hundred twenty-one trillion, twelve billion, two hundred twenty-one million, two hundred ten thousand, twenty-one".