30131221202 has 4 divisors (see below), whose sum is σ = 45196831806. Its totient is φ = 15065610600.

The previous prime is 30131221201. The next prime is 30131221217. The reversal of 30131221202 is 20212213103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20212213103 = 76163 ⋅265381.

It can be written as a sum of positive squares in only one way, i.e., 29646296761 + 484924441 = 172181^2 + 22021^2 .

It is a super-2 number, since 2×30131221202² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30131221201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7532805299 + ... + 7532805302.

Almost surely, 2^30131221202 is an apocalyptic number.

30131221202 is a deficient number, since it is larger than the sum of its proper divisors (15065610604).

30131221202 is a wasteful number, since it uses less digits than its factorization.

30131221202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15065610603.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 30131221202 its reverse (20212213103), we get a palindrome (50343434305).

The spelling of 30131221202 in words is "thirty billion, one hundred thirty-one million, two hundred twenty-one thousand, two hundred two".