1020132321221 has 4 divisors (see below), whose sum is σ = 1098604038252. Its totient is φ = 941660604192.

The previous prime is 1020132321193. The next prime is 1020132321259. The reversal of 1020132321221 is 1221232310201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 351220984321 + 668911336900 = 592639^2 + 817870^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020132321221 - 2¹⁴ = 1020132304837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020132321193 and 1020132321202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020132321281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39235858496 + ... + 39235858521.

It is an arithmetic number, because the mean of its divisors is an integer number (274651009563).

Almost surely, 2^{1020132321221} is an apocalyptic number.

It is an amenable number.

1020132321221 is a deficient number, since it is larger than the sum of its proper divisors (78471717031).

1020132321221 is an equidigital number, since it uses as much as digits as its factorization.

1020132321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78471717030.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1020132321221 its reverse (1221232310201), we get a palindrome (2241364631422).

The spelling of 1020132321221 in words is "one trillion, twenty billion, one hundred thirty-two million, three hundred twenty-one thousand, two hundred twenty-one".