101213010421 has 2 divisors, whose sum is σ = 101213010422. Its totient is φ = 101213010420.

The previous prime is 101213010397. The next prime is 101213010487. The reversal of 101213010421 is 124010312101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80451082321 + 20761928100 = 283639^2 + 144090^2 .

It is a cyclic number.

It is not a de Polignac number, because 101213010421 - 2³¹ = 99065526773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101213010395 and 101213010404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101213010121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50606505210 + 50606505211.

It is an arithmetic number, because the mean of its divisors is an integer number (50606505211).

Almost surely, 2^101213010421 is an apocalyptic number.

It is an amenable number.

101213010421 is a deficient number, since it is larger than the sum of its proper divisors (1).

101213010421 is an equidigital number, since it uses as much as digits as its factorization.

101213010421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 101213010421 its reverse (124010312101), we get a palindrome (225223322522).

The spelling of 101213010421 in words is "one hundred one billion, two hundred thirteen million, ten thousand, four hundred twenty-one".