10202121120111 has 4 divisors (see below), whose sum is σ = 13602828160152. Its totient is φ = 6801414080072.

The previous prime is 10202121120053. The next prime is 10202121120131. The reversal of 10202121120111 is 11102112120201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10202121120111 - 2⁶ = 10202121120047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202121120131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1700353520016 + ... + 1700353520021.

It is an arithmetic number, because the mean of its divisors is an integer number (3400707040038).

Almost surely, 2^{10202121120111} is an apocalyptic number.

10202121120111 is a deficient number, since it is larger than the sum of its proper divisors (3400707040041).

10202121120111 is an equidigital number, since it uses as much as digits as its factorization.

10202121120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400707040040.

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

Adding to 10202121120111 its reverse (11102112120201), we get a palindrome (21304233240312).

The spelling of 10202121120111 in words is "ten trillion, two hundred two billion, one hundred twenty-one million, one hundred twenty thousand, one hundred eleven".