1211512499842 has 64 divisors (see below), whose sum is σ = 2008413066240. Its totient is φ = 546500505600.

The previous prime is 1211512499831. The next prime is 1211512499843. The reversal of 1211512499842 is 2489942151121.

It is not an unprimeable number, because it can be changed into a prime (1211512499843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7065933 + ... + 7235359.

It is an arithmetic number, because the mean of its divisors is an integer number (31381454160).

Almost surely, 2^{1211512499842} is an apocalyptic number.

1211512499842 is a deficient number, since it is larger than the sum of its proper divisors (796900566398).

1211512499842 is a wasteful number, since it uses less digits than its factorization.

1211512499842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169627.

The product of its digits is 414720, while the sum is 49.

The spelling of 1211512499842 in words is "one trillion, two hundred eleven billion, five hundred twelve million, four hundred ninety-nine thousand, eight hundred forty-two".