110000021121 has 6 divisors (see below), whose sum is σ = 158888919410. Its totient is φ = 73333347408.

The previous prime is 110000021119. The next prime is 110000021123. The reversal of 110000021121 is 121120000011.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (110000021119) and next prime (110000021123).

It can be written as a sum of positive squares in only one way, i.e., 64432714896 + 45567306225 = 253836^2 + 213465^2 .

It is not a de Polignac number, because 110000021121 - 2¹ = 110000021119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 12222224569 = 110000021121 / (1 + 1 + 0 + 0 + 0 + 0 + 0 + 2 + 1 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (110000021123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6111112276 + ... + 6111112293.

Almost surely, 2^110000021121 is an apocalyptic number.

It is an amenable number.

110000021121 is a deficient number, since it is larger than the sum of its proper divisors (48888898289).

110000021121 is a wasteful number, since it uses less digits than its factorization.

110000021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12222224575 (or 12222224572 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 110000021121 its reverse (121120000011), we get a palindrome (231120021132).

The spelling of 110000021121 in words is "one hundred ten billion, twenty-one thousand, one hundred twenty-one".