126212458381 has 2 divisors, whose sum is σ = 126212458382. Its totient is φ = 126212458380.

The previous prime is 126212458349. The next prime is 126212458387. The reversal of 126212458381 is 183854212621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96951276900 + 29261181481 = 311370^2 + 171059^2 .

It is a cyclic number.

It is not a de Polignac number, because 126212458381 - 2⁵ = 126212458349 is a prime.

It is a super-2 number, since 2×126212458381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126212458387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63106229190 + 63106229191.

It is an arithmetic number, because the mean of its divisors is an integer number (63106229191).

Almost surely, 2^126212458381 is an apocalyptic number.

It is an amenable number.

126212458381 is a deficient number, since it is larger than the sum of its proper divisors (1).

126212458381 is an equidigital number, since it uses as much as digits as its factorization.

126212458381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 184320, while the sum is 43.

The spelling of 126212458381 in words is "one hundred twenty-six billion, two hundred twelve million, four hundred fifty-eight thousand, three hundred eighty-one".