1021200111012 has 144 divisors (see below), whose sum is σ = 2452507645952. Its totient is φ = 330667868160.

The previous prime is 1021200110993. The next prime is 1021200111049. The reversal of 1021200111012 is 2101110021201.

It is a super-3 number, since 3×1021200111012³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1887615462 + ... + 1887616002.

Almost surely, 2^{1021200111012} is an apocalyptic number.

1021200111012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021200111012 is an abundant number, since it is smaller than the sum of its proper divisors (1431307534940).

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

1021200111012 is a wasteful number, since it uses less digits than its factorization.

1021200111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998 (or 883 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1021200111012 its reverse (2101110021201), we get a palindrome (3122310132213).

The spelling of 1021200111012 in words is "one trillion, twenty-one billion, two hundred million, one hundred eleven thousand, twelve".