1000212232381 has 2 divisors, whose sum is σ = 1000212232382. Its totient is φ = 1000212232380.

The previous prime is 1000212232343. The next prime is 1000212232399. The reversal of 1000212232381 is 1832322120001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 937479015225 + 62733217156 = 968235^2 + 250466^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000212232381 - 2¹³ = 1000212224189 is a prime.

It is a super-2 number, since 2×1000212232381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000212239381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500106116190 + 500106116191.

It is an arithmetic number, because the mean of its divisors is an integer number (500106116191).

Almost surely, 2^{1000212232381} is an apocalyptic number.

It is an amenable number.

1000212232381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000212232381 is an equidigital number, since it uses as much as digits as its factorization.

1000212232381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 1000212232381 its reverse (1832322120001), we get a palindrome (2832534352382).

The spelling of 1000212232381 in words is "one trillion, two hundred twelve million, two hundred thirty-two thousand, three hundred eighty-one".