1211111433102 has 32 divisors (see below), whose sum is σ = 2565173809152. Its totient is φ = 379887306624.

The previous prime is 1211111433101. The next prime is 1211111433131. The reversal of 1211111433102 is 2013341111121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211111433101) 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, 517528 + ... + 1640139.

It is an arithmetic number, because the mean of its divisors is an integer number (80161681536).

Almost surely, 2^{1211111433102} is an apocalyptic number.

1211111433102 is an abundant number, since it is smaller than the sum of its proper divisors (1354062376050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211111433102 is a wasteful number, since it uses less digits than its factorization.

1211111433102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163192.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 1211111433102 its reverse (2013341111121), we get a palindrome (3224452544223).

The spelling of 1211111433102 in words is "one trillion, two hundred eleven billion, one hundred eleven million, four hundred thirty-three thousand, one hundred two".