1211001022102 has 4 divisors (see below), whose sum is σ = 1816501533156. Its totient is φ = 605500511050.

The previous prime is 1211001022067. The next prime is 1211001022109. The reversal of 1211001022102 is 2012201001121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211001022109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302750255524 + ... + 302750255527.

It is an arithmetic number, because the mean of its divisors is an integer number (454125383289).

Almost surely, 2^{1211001022102} is an apocalyptic number.

1211001022102 is a deficient number, since it is larger than the sum of its proper divisors (605500511054).

1211001022102 is an equidigital number, since it uses as much as digits as its factorization.

1211001022102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605500511053.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1211001022102 its reverse (2012201001121), we get a palindrome (3223202023223).

The spelling of 1211001022102 in words is "one trillion, two hundred eleven billion, one million, twenty-two thousand, one hundred two".