1211242134 has 32 divisors (see below), whose sum is σ = 2584932480. Its totient is φ = 377255232.

The previous prime is 1211242133. The next prime is 1211242177. The reversal of 1211242134 is 4312421121.

It is a self number, because there is not a number n which added to its sum of digits gives 1211242134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211242133) 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, 64452 + ... + 81095.

It is an arithmetic number, because the mean of its divisors is an integer number (80779140).

Almost surely, 2^1211242134 is an apocalyptic number.

1211242134 is an abundant number, since it is smaller than the sum of its proper divisors (1373690346).

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

1211242134 is a wasteful number, since it uses less digits than its factorization.

1211242134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145644.

The product of its digits is 384, while the sum is 21.

The square root of 1211242134 is about 34802.9041029624. The cubic root of 1211242134 is about 1065.9667458858.

Adding to 1211242134 its reverse (4312421121), we get a palindrome (5523663255).

The spelling of 1211242134 in words is "one billion, two hundred eleven million, two hundred forty-two thousand, one hundred thirty-four".