32131010021221 has 4 divisors (see below), whose sum is σ = 34021069434252. Its totient is φ = 30240950608192.

The previous prime is 32131010021147. The next prime is 32131010021233. The reversal of 32131010021221 is 12212001013123.

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 14647230208900 + 17483779812321 = 3827170^2 + 4181361^2 .

It is a cyclic number.

It is not a de Polignac number, because 32131010021221 - 2¹³ = 32131010013029 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 (32131010021921) 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, 945029706490 + ... + 945029706523.

It is an arithmetic number, because the mean of its divisors is an integer number (8505267358563).

Almost surely, 2^{32131010021221} is an apocalyptic number.

It is an amenable number.

32131010021221 is a deficient number, since it is larger than the sum of its proper divisors (1890059413031).

32131010021221 is a wasteful number, since it uses less digits than its factorization.

32131010021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890059413030.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 32131010021221 its reverse (12212001013123), we get a palindrome (44343011034344).

The spelling of 32131010021221 in words is "thirty-two trillion, one hundred thirty-one billion, ten million, twenty-one thousand, two hundred twenty-one".