20120221311 has 8 divisors (see below), whose sum is σ = 26870727600. Its totient is φ = 13391597952.

The previous prime is 20120221283. The next prime is 20120221333. The reversal of 20120221311 is 11312202102.

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

It is not a de Polignac number, because 20120221311 - 2¹⁴ = 20120204927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120221351) 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, 5468586 + ... + 5472263.

It is an arithmetic number, because the mean of its divisors is an integer number (3358840950).

Almost surely, 2^20120221311 is an apocalyptic number.

20120221311 is a deficient number, since it is larger than the sum of its proper divisors (6750506289).

20120221311 is a wasteful number, since it uses less digits than its factorization.

20120221311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10941465.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20120221311 its reverse (11312202102), we get a palindrome (31432423413).

The spelling of 20120221311 in words is "twenty billion, one hundred twenty million, two hundred twenty-one thousand, three hundred eleven".