21225035155151 has 4 divisors (see below), whose sum is σ = 22342142268600. Its totient is φ = 20107928041704.

The previous prime is 21225035155147. The next prime is 21225035155199. The reversal of 21225035155151 is 15155153052212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21225035155151 - 2² = 21225035155147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21225085155151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558553556696 + ... + 558553556733.

It is an arithmetic number, because the mean of its divisors is an integer number (5585535567150).

Almost surely, 2^{21225035155151} is an apocalyptic number.

21225035155151 is a deficient number, since it is larger than the sum of its proper divisors (1117107113449).

21225035155151 is a wasteful number, since it uses less digits than its factorization.

21225035155151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117107113448.

The product of its (nonzero) digits is 75000, while the sum is 38.

The spelling of 21225035155151 in words is "twenty-one trillion, two hundred twenty-five billion, thirty-five million, one hundred fifty-five thousand, one hundred fifty-one".