20121202311 has 16 divisors (see below), whose sum is σ = 30669859584. Its totient is φ = 11494462464.

The previous prime is 20121202303. The next prime is 20121202379. The reversal of 20121202311 is 11320212102.

It is not a de Polignac number, because 20121202311 - 2³ = 20121202303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121202301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65985 + ... + 211178.

It is an arithmetic number, because the mean of its divisors is an integer number (1916866224).

Almost surely, 2^20121202311 is an apocalyptic number.

20121202311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20121202311 is a deficient number, since it is larger than the sum of its proper divisors (10548657273).

20121202311 is a wasteful number, since it uses less digits than its factorization.

20121202311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280630.

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

Adding to 20121202311 its reverse (11320212102), we get a palindrome (31441414413).

The spelling of 20121202311 in words is "twenty billion, one hundred twenty-one million, two hundred two thousand, three hundred eleven".