10111212110021 has 8 divisors (see below), whose sum is σ = 11509996394304. Its totient is φ = 8792358356320.

The previous prime is 10111212110017. The next prime is 10111212110029. The reversal of 10111212110021 is 12001121211101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10111212110021 - 2² = 10111212110017 is a prime.

It is a super-2 number, since 2×10111212110021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10111212109978 and 10111212110005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111212110029) 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, 19982632376 + ... + 19982632881.

It is an arithmetic number, because the mean of its divisors is an integer number (1438749549288).

Almost surely, 2^{10111212110021} is an apocalyptic number.

10111212110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10111212110021 is a deficient number, since it is larger than the sum of its proper divisors (1398784284283).

10111212110021 is a wasteful number, since it uses less digits than its factorization.

10111212110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39965265291.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 10111212110021 its reverse (12001121211101), we get a palindrome (22112333321122).

The spelling of 10111212110021 in words is "ten trillion, one hundred eleven billion, two hundred twelve million, one hundred ten thousand, twenty-one".