121220210021021 has 8 divisors (see below), whose sum is σ = 121616217048480. Its totient is φ = 120824210480688.

The previous prime is 121220210021017. The next prime is 121220210021063. The reversal of 121220210021021 is 120120012022121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121220210021021 - 2² = 121220210021017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220210021081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31534250 + ... + 35168868.

It is an arithmetic number, because the mean of its divisors is an integer number (15202027131060).

Almost surely, 2^{121220210021021} is an apocalyptic number.

It is an amenable number.

121220210021021 is a deficient number, since it is larger than the sum of its proper divisors (396007027459).

121220210021021 is a wasteful number, since it uses less digits than its factorization.

121220210021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3743563.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121220210021021 its reverse (120120012022121), we get a palindrome (241340222043142).

The spelling of 121220210021021 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred ten million, twenty-one thousand, twenty-one".