111020120021121 has 16 divisors (see below), whose sum is σ = 149690933625600. Its totient is φ = 73181369706368.

The previous prime is 111020120021077. The next prime is 111020120021131. The reversal of 111020120021121 is 121120021020111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111020120021121 - 2¹⁷ = 111020119890049 is a prime.

It is a super-2 number, since 2×111020120021121² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111020120021121.

It is not an unprimeable number, because it can be changed into a prime (111020120021131) 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, 47704975 + ... + 49978043.

It is an arithmetic number, because the mean of its divisors is an integer number (9355683351600).

Almost surely, 2^{111020120021121} is an apocalyptic number.

It is an amenable number.

111020120021121 is a deficient number, since it is larger than the sum of its proper divisors (38670813604479).

111020120021121 is a wasteful number, since it uses less digits than its factorization.

111020120021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456088.

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

Adding to 111020120021121 its reverse (121120021020111), we get a palindrome (232140141041232).

The spelling of 111020120021121 in words is "one hundred eleven trillion, twenty billion, one hundred twenty million, twenty-one thousand, one hundred twenty-one".