101421002381 has 2 divisors, whose sum is σ = 101421002382. Its totient is φ = 101421002380.

The previous prime is 101421002369. The next prime is 101421002429. The reversal of 101421002381 is 183200124101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72191629225 + 29229373156 = 268685^2 + 170966^2 .

It is a cyclic number.

It is not a de Polignac number, because 101421002381 - 2¹⁴ = 101420985997 is a prime.

It is a super-2 number, since 2×101421002381² (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 (101421002341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50710501190 + 50710501191.

It is an arithmetic number, because the mean of its divisors is an integer number (50710501191).

Almost surely, 2^101421002381 is an apocalyptic number.

It is an amenable number.

101421002381 is a deficient number, since it is larger than the sum of its proper divisors (1).

101421002381 is an equidigital number, since it uses as much as digits as its factorization.

101421002381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 101421002381 its reverse (183200124101), we get a palindrome (284621126482).

The spelling of 101421002381 in words is "one hundred one billion, four hundred twenty-one million, two thousand, three hundred eighty-one".