121230221021 has 64 divisors (see below), whose sum is σ = 160983674880. Its totient is φ = 88693678080.

The previous prime is 121230220967. The next prime is 121230221023. The reversal of 121230221021 is 120122032121.

It is not a de Polignac number, because 121230221021 - 2³⁴ = 104050351837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121230221023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7927835 + ... + 7943111.

It is an arithmetic number, because the mean of its divisors is an integer number (2515369920).

Almost surely, 2^121230221021 is an apocalyptic number.

It is an amenable number.

121230221021 is a deficient number, since it is larger than the sum of its proper divisors (39753453859).

121230221021 is a wasteful number, since it uses less digits than its factorization.

121230221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15454.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 121230221021 its reverse (120122032121), we get a palindrome (241352253142).

The spelling of 121230221021 in words is "one hundred twenty-one billion, two hundred thirty million, two hundred twenty-one thousand, twenty-one".