102112122121211 has 4 divisors (see below), whose sum is σ = 103123133231424. Its totient is φ = 101101111011000.

The previous prime is 102112122121159. The next prime is 102112122121313. The reversal of 102112122121211 is 112121221211201.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102112122121211 is a prime.

It is a super-2 number, since 2×102112122121211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102112122121111) 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, 505505554955 + ... + 505505555156.

It is an arithmetic number, because the mean of its divisors is an integer number (25780783307856).

Almost surely, 2^{102112122121211} is an apocalyptic number.

102112122121211 is a deficient number, since it is larger than the sum of its proper divisors (1011011110213).

102112122121211 is a wasteful number, since it uses less digits than its factorization.

102112122121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011011110212.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 102112122121211 its reverse (112121221211201), we get a palindrome (214233343332412).

The spelling of 102112122121211 in words is "one hundred two trillion, one hundred twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred eleven".