1211497828692 has 12 divisors (see below), whose sum is σ = 2826828266976. Its totient is φ = 403832609560.

The previous prime is 1211497828631. The next prime is 1211497828733. The reversal of 1211497828692 is 2968287941121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×1211497828692³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50479076184 + ... + 50479076207.

It is an arithmetic number, because the mean of its divisors is an integer number (235569022248).

Almost surely, 2^{1211497828692} is an apocalyptic number.

1211497828692 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211497828692 is an abundant number, since it is smaller than the sum of its proper divisors (1615330438284).

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

1211497828692 is a wasteful number, since it uses less digits than its factorization.

1211497828692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100958152398 (or 100958152396 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 60.

The spelling of 1211497828692 in words is "one trillion, two hundred eleven billion, four hundred ninety-seven million, eight hundred twenty-eight thousand, six hundred ninety-two".