102021212012111 has 16 divisors (see below), whose sum is σ = 117142521338880. Its totient is φ = 87037317003840.

The previous prime is 102021212012051. The next prime is 102021212012119. The reversal of 102021212012111 is 111210212120201.

It is not a de Polignac number, because 102021212012111 - 2²⁶ = 102021144903247 is a prime.

It is a super-4 number, since 4×102021212012111⁴ (a number of 57 digits) contains 4444 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 102021212012111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021212012119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27492251 + ... + 30981708.

It is an arithmetic number, because the mean of its divisors is an integer number (7321407583680).

Almost surely, 2^{102021212012111} is an apocalyptic number.

102021212012111 is a deficient number, since it is larger than the sum of its proper divisors (15121309326769).

102021212012111 is an equidigital number, since it uses as much as digits as its factorization.

102021212012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58475134.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 102021212012111 its reverse (111210212120201), we get a palindrome (213231424132312).

The spelling of 102021212012111 in words is "one hundred two trillion, twenty-one billion, two hundred twelve million, twelve thousand, one hundred eleven".