20120321123011 has 4 divisors (see below), whose sum is σ = 20172854598912. Its totient is φ = 20067787647112.

The previous prime is 20120321122997. The next prime is 20120321123029. The reversal of 20120321123011 is 11032112302102.

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 20120321123011 - 2⁴³ = 11324228100803 is a prime.

It is a super-2 number, since 2×20120321123011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20120321123011.

It is not an unprimeable number, because it can be changed into a prime (20120321123051) 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, 26266737376 + ... + 26266738141.

It is an arithmetic number, because the mean of its divisors is an integer number (5043213649728).

Almost surely, 2^{20120321123011} is an apocalyptic number.

20120321123011 is a deficient number, since it is larger than the sum of its proper divisors (52533475901).

20120321123011 is an equidigital number, since it uses as much as digits as its factorization.

20120321123011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52533475900.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20120321123011 its reverse (11032112302102), we get a palindrome (31152433425113).

The spelling of 20120321123011 in words is "twenty trillion, one hundred twenty billion, three hundred twenty-one million, one hundred twenty-three thousand, eleven".