1211311220132 has 12 divisors (see below), whose sum is σ = 2282855761116. Its totient is φ = 559066716960.

The previous prime is 1211311220107. The next prime is 1211311220149. The reversal of 1211311220132 is 2310221131121.

It can be written as a sum of positive squares in 2 ways, for example, as 830296374436 + 381014845696 = 911206^2 + 617264^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11647223219 + ... + 11647223322.

It is an arithmetic number, because the mean of its divisors is an integer number (190237980093).

Almost surely, 2^{1211311220132} is an apocalyptic number.

It is an amenable number.

1211311220132 is a deficient number, since it is larger than the sum of its proper divisors (1071544540984).

1211311220132 is a wasteful number, since it uses less digits than its factorization.

1211311220132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23294446558 (or 23294446556 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1211311220132 its reverse (2310221131121), we get a palindrome (3521532351253).

The spelling of 1211311220132 in words is "one trillion, two hundred eleven billion, three hundred eleven million, two hundred twenty thousand, one hundred thirty-two".