20120102111021 has 8 divisors (see below), whose sum is σ = 21962353432800. Its totient is φ = 18280042644240.

The previous prime is 20120102111003. The next prime is 20120102111027. The reversal of 20120102111021 is 12011120102102.

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 20120102111021 - 2²² = 20120097916717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20120102110987 and 20120102111005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120102111027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547944551 + ... + 547981268.

It is an arithmetic number, because the mean of its divisors is an integer number (2745294179100).

Almost surely, 2^{20120102111021} is an apocalyptic number.

It is an amenable number.

20120102111021 is a deficient number, since it is larger than the sum of its proper divisors (1842251321779).

20120102111021 is a wasteful number, since it uses less digits than its factorization.

20120102111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095927499.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20120102111021 its reverse (12011120102102), we get a palindrome (32131222213123).

The spelling of 20120102111021 in words is "twenty trillion, one hundred twenty billion, one hundred two million, one hundred eleven thousand, twenty-one".