111012121501 has 2 divisors, whose sum is σ = 111012121502. Its totient is φ = 111012121500.

The previous prime is 111012121453. The next prime is 111012121523. The reversal of 111012121501 is 105121210111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109609993476 + 1402128025 = 331074^2 + 37445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111012121501 is a prime.

It is a super-2 number, since 2×111012121501² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111012131501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55506060750 + 55506060751.

It is an arithmetic number, because the mean of its divisors is an integer number (55506060751).

Almost surely, 2^111012121501 is an apocalyptic number.

It is an amenable number.

111012121501 is a deficient number, since it is larger than the sum of its proper divisors (1).

111012121501 is an equidigital number, since it uses as much as digits as its factorization.

111012121501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20, while the sum is 16.

Adding to 111012121501 its reverse (105121210111), we get a palindrome (216133331612).

The spelling of 111012121501 in words is "one hundred eleven billion, twelve million, one hundred twenty-one thousand, five hundred one".