20215255101 has 8 divisors (see below), whose sum is σ = 28539183744. Its totient is φ = 12684081600.

The previous prime is 20215255091. The next prime is 20215255111. The reversal of 20215255101 is 10155251202.

It is an interprime number because it is at equal distance from previous prime (20215255091) and next prime (20215255111).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20215255101 - 2⁶ = 20215255037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20215255111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198188725 + ... + 198188826.

It is an arithmetic number, because the mean of its divisors is an integer number (3567397968).

Almost surely, 2^20215255101 is an apocalyptic number.

It is an amenable number.

20215255101 is a deficient number, since it is larger than the sum of its proper divisors (8323928643).

20215255101 is a wasteful number, since it uses less digits than its factorization.

20215255101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396377571.

The product of its (nonzero) digits is 1000, while the sum is 24.

The spelling of 20215255101 in words is "twenty billion, two hundred fifteen million, two hundred fifty-five thousand, one hundred one".