101211220021357 has 2 divisors, whose sum is σ = 101211220021358. Its totient is φ = 101211220021356.

The previous prime is 101211220021141. The next prime is 101211220021367. The reversal of 101211220021357 is 753120022112101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61756163703081 + 39455056318276 = 7858509^2 + 6281326^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101211220021357 is a prime.

It is a super-2 number, since 2×101211220021357² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101211220021367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50605610010678 + 50605610010679.

It is an arithmetic number, because the mean of its divisors is an integer number (50605610010679).

Almost surely, 2^{101211220021357} is an apocalyptic number.

It is an amenable number.

101211220021357 is a deficient number, since it is larger than the sum of its proper divisors (1).

101211220021357 is an equidigital number, since it uses as much as digits as its factorization.

101211220021357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 28.

Adding to 101211220021357 its reverse (753120022112101), we get a palindrome (854331242133458).

The spelling of 101211220021357 in words is "one hundred one trillion, two hundred eleven billion, two hundred twenty million, twenty-one thousand, three hundred fifty-seven".