111221662620121 has 16 divisors (see below), whose sum is σ = 115714010971648. Its totient is φ = 106788137702400.

The previous prime is 111221662620083. The next prime is 111221662620139. The reversal of 111221662620121 is 121026266122111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111221662620121 is a prime.

It is a super-3 number, since 3×111221662620121³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111221662627121) 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, 16158090 + ... + 21989251.

It is an arithmetic number, because the mean of its divisors is an integer number (7232125685728).

Almost surely, 2^{111221662620121} is an apocalyptic number.

It is an amenable number.

111221662620121 is a deficient number, since it is larger than the sum of its proper divisors (4492348351527).

111221662620121 is a wasteful number, since it uses less digits than its factorization.

111221662620121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38148112.

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 111221662620121 in words is "one hundred eleven trillion, two hundred twenty-one billion, six hundred sixty-two million, six hundred twenty thousand, one hundred twenty-one".