31022202121 has 8 divisors (see below), whose sum is σ = 31093101000. Its totient is φ = 30951381120.

The previous prime is 31022202067. The next prime is 31022202143. The reversal of 31022202121 is 12120222013.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1708995600 + 29313206521 = 41340^2 + 171211^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 31022202121 - 2¹⁷ = 31022071049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31022202095 and 31022202104.

It is not an unprimeable number, because it can be changed into a prime (31022202221) 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, 818805 + ... + 855853.

It is an arithmetic number, because the mean of its divisors is an integer number (3886637625).

Almost surely, 2^31022202121 is an apocalyptic number.

It is an amenable number.

31022202121 is a deficient number, since it is larger than the sum of its proper divisors (70898879).

31022202121 is a wasteful number, since it uses less digits than its factorization.

31022202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38939.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31022202121 its reverse (12120222013), we get a palindrome (43142424134).

The spelling of 31022202121 in words is "thirty-one billion, twenty-two million, two hundred two thousand, one hundred twenty-one".