20121102011 has 8 divisors (see below), whose sum is σ = 21275089920. Its totient is φ = 18976612392.

The previous prime is 20121102007. The next prime is 20121102037. The reversal of 20121102011 is 11020112102.

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 20121102011 - 2² = 20121102007 is a prime.

It is a super-2 number, since 2×20121102011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20121101983 and 20121102001.

It is not an unprimeable number, because it can be changed into a prime (20121102061) 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, 2370215 + ... + 2378688.

It is an arithmetic number, because the mean of its divisors is an integer number (2659386240).

Almost surely, 2^20121102011 is an apocalyptic number.

20121102011 is a deficient number, since it is larger than the sum of its proper divisors (1153987909).

20121102011 is a wasteful number, since it uses less digits than its factorization.

20121102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749145.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20121102011 its reverse (11020112102), we get a palindrome (31141214113).

The spelling of 20121102011 in words is "twenty billion, one hundred twenty-one million, one hundred two thousand, eleven".