12021002121111 has 8 divisors (see below), whose sum is σ = 16028253533424. Its totient is φ = 8013876061440.

The previous prime is 12021002121077. The next prime is 12021002121113. The reversal of 12021002121111 is 11112120012021.

It is a happy number.

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

It is not a de Polignac number, because 12021002121111 - 2²¹ = 12021000023959 is a prime.

It is a super-2 number, since 2×12021002121111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021002121113) 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, 31114170 + ... + 31498151.

It is an arithmetic number, because the mean of its divisors is an integer number (2003531691678).

Almost surely, 2^{12021002121111} is an apocalyptic number.

12021002121111 is a deficient number, since it is larger than the sum of its proper divisors (4007251412313).

12021002121111 is an equidigital number, since it uses as much as digits as its factorization.

12021002121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62676321.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12021002121111 its reverse (11112120012021), we get a palindrome (23133122133132).

The spelling of 12021002121111 in words is "twelve trillion, twenty-one billion, two million, one hundred twenty-one thousand, one hundred eleven".