1201210021012 has 24 divisors (see below), whose sum is σ = 2107530610920. Its totient is φ = 599058662400.

The previous prime is 1201210020991. The next prime is 1201210021021. The reversal of 1201210021012 is 2101200121021.

It can be written as a sum of positive squares in 4 ways, for example, as 125915683716 + 1075294337296 = 354846^2 + 1036964^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1201210020983 and 1201210021001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27581478 + ... + 27624994.

It is an arithmetic number, because the mean of its divisors is an integer number (87813775455).

Almost surely, 2^{1201210021012} is an apocalyptic number.

It is an amenable number.

1201210021012 is a deficient number, since it is larger than the sum of its proper divisors (906320589908).

1201210021012 is a wasteful number, since it uses less digits than its factorization.

1201210021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61131 (or 61129 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1201210021012 its reverse (2101200121021), we get a palindrome (3302410142033).

The spelling of 1201210021012 in words is "one trillion, two hundred one billion, two hundred ten million, twenty-one thousand, twelve".