126212255631 has 144 divisors (see below), whose sum is σ = 238163328000. Its totient is φ = 63661852800.

The previous prime is 126212255629. The next prime is 126212255633. The reversal of 126212255631 is 136552212621.

126212255631 is a `hidden beast` number, since 1 + 2 + 6 + 2 + 12 + 2 + 5 + 5 + 631 = 666.

It is an interprime number because it is at equal distance from previous prime (126212255629) and next prime (126212255633).

It is not a de Polignac number, because 126212255631 - 2¹ = 126212255629 is a prime.

It is a super-2 number, since 2×126212255631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126212255633) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 23374270 + ... + 23379668.

It is an arithmetic number, because the mean of its divisors is an integer number (1653912000).

Almost surely, 2^126212255631 is an apocalyptic number.

126212255631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

126212255631 is a deficient number, since it is larger than the sum of its proper divisors (111951072369).

126212255631 is a wasteful number, since it uses less digits than its factorization.

126212255631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5570 (or 5560 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The spelling of 126212255631 in words is "one hundred twenty-six billion, two hundred twelve million, two hundred fifty-five thousand, six hundred thirty-one".