20102221051 has 8 divisors (see below), whose sum is σ = 21931377408. Its totient is φ = 18273345000.

The previous prime is 20102221001. The next prime is 20102221159. The reversal of 20102221051 is 15012220102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20102221051 - 2¹³ = 20102212859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102221001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97266 + ... + 222856.

It is an arithmetic number, because the mean of its divisors is an integer number (2741422176).

Almost surely, 2^20102221051 is an apocalyptic number.

20102221051 is a deficient number, since it is larger than the sum of its proper divisors (1829156357).

20102221051 is a wasteful number, since it uses less digits than its factorization.

20102221051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140153.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 20102221051 its reverse (15012220102), we get a palindrome (35114441153).

The spelling of 20102221051 in words is "twenty billion, one hundred two million, two hundred twenty-one thousand, fifty-one".