1211826862012 has 144 divisors (see below), whose sum is σ = 2402108654400. Its totient is φ = 534237849600.

The previous prime is 1211826861953. The next prime is 1211826862013. The reversal of 1211826862012 is 2102686281121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211826862013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 293205498 + ... + 293209630.

It is an arithmetic number, because the mean of its divisors is an integer number (16681310100).

Almost surely, 2^{1211826862012} is an apocalyptic number.

It is an amenable number.

1211826862012 is a deficient number, since it is larger than the sum of its proper divisors (1190281792388).

1211826862012 is a wasteful number, since it uses less digits than its factorization.

1211826862012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4424 (or 4409 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The spelling of 1211826862012 in words is "one trillion, two hundred eleven billion, eight hundred twenty-six million, eight hundred sixty-two thousand, twelve".