121320101333021 has 8 divisors (see below), whose sum is σ = 125675522897400. Its totient is φ = 117031174754560.

The previous prime is 121320101333003. The next prime is 121320101333029. The reversal of 121320101333021 is 120333101023121.

It can be written as a sum of positive squares in 4 ways, for example, as 329143164100 + 120990958168921 = 573710^2 + 10999589^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121320101333021 is a prime.

It is a super-2 number, since 2×121320101333021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121320101333029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16623742766 + ... + 16623750063.

It is an arithmetic number, because the mean of its divisors is an integer number (15709440362175).

Almost surely, 2^{121320101333021} is an apocalyptic number.

It is an amenable number.

121320101333021 is a deficient number, since it is larger than the sum of its proper divisors (4355421564379).

121320101333021 is an equidigital number, since it uses as much as digits as its factorization.

121320101333021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33247492959.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 121320101333021 its reverse (120333101023121), we get a palindrome (241653202356142).

The spelling of 121320101333021 in words is "one hundred twenty-one trillion, three hundred twenty billion, one hundred one million, three hundred thirty-three thousand, twenty-one".