102111012121211 has 4 divisors (see below), whose sum is σ = 103635057078312. Its totient is φ = 100586967164112.

The previous prime is 102111012121193. The next prime is 102111012121309. The reversal of 102111012121211 is 112121210111201.

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 102111012121211 - 2²⁶ = 102110945012347 is a prime.

It is a super-2 number, since 2×102111012121211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102111012121211.

It is not an unprimeable number, because it can be changed into a prime (102111012124211) 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, 762022478450 + ... + 762022478583.

It is an arithmetic number, because the mean of its divisors is an integer number (25908764269578).

Almost surely, 2^{102111012121211} is an apocalyptic number.

102111012121211 is a deficient number, since it is larger than the sum of its proper divisors (1524044957101).

102111012121211 is an equidigital number, since it uses as much as digits as its factorization.

102111012121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524044957100.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 102111012121211 its reverse (112121210111201), we get a palindrome (214232222232412).

The spelling of 102111012121211 in words is "one hundred two trillion, one hundred eleven billion, twelve million, one hundred twenty-one thousand, two hundred eleven".