101672155021 has 2 divisors, whose sum is σ = 101672155022. Its totient is φ = 101672155020.

The previous prime is 101672154929. The next prime is 101672155033. The reversal of 101672155021 is 120551276101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86441880100 + 15230274921 = 294010^2 + 123411^2 .

It is a cyclic number.

It is not a de Polignac number, because 101672155021 - 2³¹ = 99524671373 is a prime.

It is a super-2 number, since 2×101672155021² (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 (101672153021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50836077510 + 50836077511.

It is an arithmetic number, because the mean of its divisors is an integer number (50836077511).

Almost surely, 2^101672155021 is an apocalyptic number.

It is an amenable number.

101672155021 is a deficient number, since it is larger than the sum of its proper divisors (1).

101672155021 is an equidigital number, since it uses as much as digits as its factorization.

101672155021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 31.

The spelling of 101672155021 in words is "one hundred one billion, six hundred seventy-two million, one hundred fifty-five thousand, twenty-one".