1211222020102 has 4 divisors (see below), whose sum is σ = 1816833030156. Its totient is φ = 605611010050.

The previous prime is 1211222020097. The next prime is 1211222020157. The reversal of 1211222020102 is 2010202221121.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302805505024 + ... + 302805505027.

It is an arithmetic number, because the mean of its divisors is an integer number (454208257539).

Almost surely, 2^{1211222020102} is an apocalyptic number.

1211222020102 is a deficient number, since it is larger than the sum of its proper divisors (605611010054).

1211222020102 is an equidigital number, since it uses as much as digits as its factorization.

1211222020102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605611010053.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1211222020102 its reverse (2010202221121), we get a palindrome (3221424241223).

The spelling of 1211222020102 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, twenty thousand, one hundred two".