20110021020123 has 16 divisors (see below), whose sum is σ = 27138430480896. Its totient is φ = 13244170126880.

The previous prime is 20110021020077. The next prime is 20110021020139. The reversal of 20110021020123 is 32102012001102.

It is a cyclic number.

It is not a de Polignac number, because 20110021020123 - 2⁶ = 20110021020059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20110021020623) 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, 364153 + ... + 6352373.

It is an arithmetic number, because the mean of its divisors is an integer number (1696151905056).

Almost surely, 2^{20110021020123} is an apocalyptic number.

20110021020123 is a deficient number, since it is larger than the sum of its proper divisors (7028409460773).

20110021020123 is a wasteful number, since it uses less digits than its factorization.

20110021020123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6001794.

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

Adding to 20110021020123 its reverse (32102012001102), we get a palindrome (52212033021225).

The spelling of 20110021020123 in words is "twenty trillion, one hundred ten billion, twenty-one million, twenty thousand, one hundred twenty-three".