137721261131 has 2 divisors, whose sum is σ = 137721261132. Its totient is φ = 137721261130.

The previous prime is 137721261089. The next prime is 137721261163. The reversal of 137721261131 is 131162127731.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137721261131 is a prime.

It is a super-2 number, since 2×137721261131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 137721261091 and 137721261100.

It is not a weakly prime, because it can be changed into another prime (137721263131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68860630565 + 68860630566.

It is an arithmetic number, because the mean of its divisors is an integer number (68860630566).

Almost surely, 2^137721261131 is an apocalyptic number.

137721261131 is a deficient number, since it is larger than the sum of its proper divisors (1).

137721261131 is an equidigital number, since it uses as much as digits as its factorization.

137721261131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 35.

Adding to 137721261131 its reverse (131162127731), we get a palindrome (268883388862).

The spelling of 137721261131 in words is "one hundred thirty-seven billion, seven hundred twenty-one million, two hundred sixty-one thousand, one hundred thirty-one".