101021213123 has 2 divisors, whose sum is σ = 101021213124. Its totient is φ = 101021213122.

The previous prime is 101021213099. The next prime is 101021213143. The reversal of 101021213123 is 321312120101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101021213123 - 2¹² = 101021209027 is a prime.

It is not a weakly prime, because it can be changed into another prime (101021213143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50510606561 + 50510606562.

It is an arithmetic number, because the mean of its divisors is an integer number (50510606562).

Almost surely, 2^101021213123 is an apocalyptic number.

101021213123 is a deficient number, since it is larger than the sum of its proper divisors (1).

101021213123 is an equidigital number, since it uses as much as digits as its factorization.

101021213123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 101021213123 its reverse (321312120101), we get a palindrome (422333333224).

The spelling of 101021213123 in words is "one hundred one billion, twenty-one million, two hundred thirteen thousand, one hundred twenty-three".