1021102123211 has 4 divisors (see below), whose sum is σ = 1021107681792. Its totient is φ = 1021096564632.

The previous prime is 1021102123207. The next prime is 1021102123229. The reversal of 1021102123211 is 1123212011201.

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 1021102123211 - 2² = 1021102123207 is a prime.

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 1021102123211.

It is not an unprimeable number, because it can be changed into a prime (1021102123231) 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, 2493980 + ... + 2874393.

It is an arithmetic number, because the mean of its divisors is an integer number (255276920448).

Almost surely, 2^{1021102123211} is an apocalyptic number.

1021102123211 is a deficient number, since it is larger than the sum of its proper divisors (5558581).

1021102123211 is an equidigital number, since it uses as much as digits as its factorization.

1021102123211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5558580.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1021102123211 its reverse (1123212011201), we get a palindrome (2144314134412).

The spelling of 1021102123211 in words is "one trillion, twenty-one billion, one hundred two million, one hundred twenty-three thousand, two hundred eleven".