121301202021321 has 24 divisors (see below), whose sum is σ = 189494169684960. Its totient is φ = 68816303704512.

The previous prime is 121301202021301. The next prime is 121301202021403. The reversal of 121301202021321 is 123120202103121.

It is not a de Polignac number, because 121301202021321 - 2⁴² = 116903155510217 is a prime.

It is a super-2 number, since 2×121301202021321² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (121301202021301) 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, 2968246636 + ... + 2968287501.

It is an arithmetic number, because the mean of its divisors is an integer number (7895590403540).

Almost surely, 2^{121301202021321} is an apocalyptic number.

It is an amenable number.

121301202021321 is a deficient number, since it is larger than the sum of its proper divisors (68192967663639).

121301202021321 is a wasteful number, since it uses less digits than its factorization.

121301202021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5936534293 (or 5936534286 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 121301202021321 its reverse (123120202103121), we get a palindrome (244421404124442).

The spelling of 121301202021321 in words is "one hundred twenty-one trillion, three hundred one billion, two hundred two million, twenty-one thousand, three hundred twenty-one".