1211051828542 has 16 divisors (see below), whose sum is σ = 1845625655952. Its totient is φ = 595862245440.

The previous prime is 1211051828477. The next prime is 1211051828543. The reversal of 1211051828542 is 2458281501121.

It is a junction number, because it is equal to n+sod(n) for n = 1211051828495 and 1211051828504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211051828543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4614009 + ... + 4869412.

It is an arithmetic number, because the mean of its divisors is an integer number (115351603497).

Almost surely, 2^{1211051828542} is an apocalyptic number.

1211051828542 is a deficient number, since it is larger than the sum of its proper divisors (634573827410).

1211051828542 is an equidigital number, since it uses as much as digits as its factorization.

1211051828542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9484443.

The product of its (nonzero) digits is 51200, while the sum is 40.

The spelling of 1211051828542 in words is "one trillion, two hundred eleven billion, fifty-one million, eight hundred twenty-eight thousand, five hundred forty-two".