31213031202061 has 2 divisors, whose sum is σ = 31213031202062. Its totient is φ = 31213031202060.

The previous prime is 31213031202053. The next prime is 31213031202149. The reversal of 31213031202061 is 16020213031213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22846440242025 + 8366590960036 = 4779795^2 + 2892506^2 .

It is a cyclic number.

It is not a de Polignac number, because 31213031202061 - 2³ = 31213031202053 is a prime.

It is a super-2 number, since 2×31213031202061² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31213031200061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606515601030 + 15606515601031.

It is an arithmetic number, because the mean of its divisors is an integer number (15606515601031).

Almost surely, 2^{31213031202061} is an apocalyptic number.

It is an amenable number.

31213031202061 is a deficient number, since it is larger than the sum of its proper divisors (1).

31213031202061 is an equidigital number, since it uses as much as digits as its factorization.

31213031202061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 31213031202061 its reverse (16020213031213), we get a palindrome (47233244233274).

The spelling of 31213031202061 in words is "thirty-one trillion, two hundred thirteen billion, thirty-one million, two hundred two thousand, sixty-one".